Questions tagged [sex]

For questions relating to sexual reproduction and the physical acts of mating that sexual beings engage in.

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Interaction on fantasy race crossing romance [closed]

In my world, most of the fantasy races are very different from the typical. While there are some like ghouls, trolls, etc., there are animal people races instead of elves and dwarves. At some point, ...
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  • 897
4 votes
3 answers
128 views

How long would a species have to have this brain symbiote to prevent early puberty?

So, a race of sapient aliens I designed for a series of short stories owes its sapience in part to a symbiote which lives in their brains and produces hormones that induce the brain to grow faster and ...
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3 votes
5 answers
221 views

Would lack of sexual dimorphism negatively impact a brutish humanoid species

In the world I am making I am wanting to portray the orcs as a race of testosterone filled and fairy hating frat bros, where the only difference between a man and a woman is the thing between their ...
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19 votes
15 answers
6k views

No one wants to reproduce because it's disgusting, how does the species avoid extinction?

One of the species in my world is very asexual. In this species, males and females are rarely if ever attracted to other individuals. It is something that developed through the past few decades and ...
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  • 374
0 votes
5 answers
514 views

Why would women with a huge belly be considered attractive?

In many modern cultures, the hourglass-shaped woman is help up as the epitome of attractiveness. In my story, there are sixteen species of the Homo genus (humans) that can all interbreed: anatomically ...
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7 votes
2 answers
391 views

Choke on the bitter fruit of my demise

In death a new beginning is certain, for the jaws that bit my flesh will suffer a tragic end and no amount of laments or tears will ease the pain. My blood will flower and fruit inside their bodies, ...
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  • 1,732
1 vote
2 answers
175 views

Complications from drafting human breeding stock [closed]

We all know about the various obsessions of the kings from olde times... Some women liked bathing in the blood of virgins, well ex virgins after watching them being raped by guards and animals...some ...
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0 votes
6 answers
268 views

Winning the game of life

all lifeforms alive today want to live and reproduce as much as possible, because those with differing ideas are extinct or about to be. Clearly the meaning of life is nothing else but to keep your ...
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5 votes
7 answers
291 views

What biologically would cause enforced sexual monogamy, and what could reverse it?

This idea came to me after reading up on the relationships of the prairie vole and the research done into why monogamous pair-bonding occurs. What I'm looking for in my story is biologically enforced ...
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2 votes
4 answers
298 views

Does attractiveness naturally change every few years in medieval settings? [closed]

120 years ago being skinny was seen as unhealthy ugly and diseased, a sickening gross look to be skinny, women were actively shamed for that. 50 years ago dark skin was gross. then people started ...
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1 vote
2 answers
208 views

Single-sex species that has specific culture roles for different body types? [closed]

Basically what the title question says. I want there to at least be three socially constructed genders, each with their own expectations of how they should act and dress. I want the species to have a ...
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1 vote
0 answers
150 views

An intelligent species needs same-sex intercourse. Society Effects? [closed]

For one of my Damarian species, the Avari (Felinoid obligate carnivores), they need same-sex intercourse of both kinds to increase chances of conceiving. For females, they can increase their ovulation ...
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6 votes
5 answers
686 views

How would it feel for a woman to be placed into a male body? [physiology only] [closed]

There are plenty of sex differences in human physiology: Body composition, skeleton, hormones, sexual organs, sensory systems, etc. My question is: How would it feel for a woman to be placed into a ...
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  • 6,575
5 votes
7 answers
7k views

Stigma of virginity and chastity loophole

In my world there is a theocratic empire where all the citizens of the empire, when born, have stigma of virginity and chastity engraved on their bodies by the goddess of love. There are only two ...
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  • 115
2 votes
3 answers
309 views

Alien vixen on the hunt for sperm donor rewards

Sorry for the slightly X-rated question, I have an alien vixen, like a bounty hunter but her game is those rarest genomes for the sperm donation clinic, she can lure her males but the issue is about ...
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10 votes
3 answers
969 views

What would be the most comfortable position for mermaids and humans to engage in sexual relationships?

Alice the mermaid and Bob the human have been dating each other for quite some time, and being young adults filled with love and copious amounts of hormones the two of them want to take their ...
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  • 13.3k
1 vote
1 answer
149 views

Can faces be considered sexual? [closed]

Let's say there's a culture of people which never show their faces, except from when eating, but they only uncover their mouths and only with family. Otherwise they never show their faces to anyone. ...
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12 votes
7 answers
4k views

How would interspecies lovers with alien body plans safely engage in physical intimacy?

Now I had previously asked how a loving interspecies couple would work around very Alien Body Plans that is now sadly closed (How will interspecies lovers overcome different body plans?) That question ...
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  • 1,885
0 votes
1 answer
178 views

Human-Alien Hybrid Babies (18+) [closed]

Okay, I have stories with interspecies sex, complete with viable offspring. What kind of gene editing would be needed for that to even work, and how would the resulting child's genes be expressed? And ...
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  • 2,210
10 votes
7 answers
817 views

How different can an alien be from us if it is possible for us to have sex and procreate?

Aliens have arrived to Earth from the depths of space, and thankfully they are peaceful and only want to learn about us and interact with us. Despite some initial trepidation, first contact goes well ...
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  • 5,913
3 votes
2 answers
323 views

Is there a real-life intersex condition that leads to functioning ovaries but with some male secondary sex characteristics?

One of the main characters in my story has an intersex mother (dead by the time of the plot). She was assigned male at birth due to her prominent penis that led a physician to conclude that she may ...
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  • 604
45 votes
16 answers
9k views

I have a superpower that no-one can say "no" to me. How can I get informed consent?

I have a character who has a super power that gives them what can be best described as perfect pheromones, and when in their presence, anyone will volunteer for anything they want. (Eg in existing ...
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  • 43.3k
2 votes
3 answers
190 views

Wings going from locomotive purposes in juveniles to sexual purposes in adults, plausible?

So I thought about how my dragon-like species would get it's wings between the arms and legs and I figured that this would be the evolutionary path for such a creature: Hexapodal ancestor -> ...
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  • 4,045
4 votes
1 answer
89 views

Linking genetic sex to a set of climate adaptations

My world is fairly chaotic, with the same 2/3 of it being completely broken up and remade in chunks such that the whole 2/3 is always completely different than it was ten years ago. So once species ...
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  • 1,886
8 votes
5 answers
1k views

What would cause vampires to become aroused when feeding?

I know that vampire bites could be very...erotic in most fictions, mostly due to proximity and intimate nature; more so with a human partner and it's heavily empathised but I'm wanting to understand ...
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  • 1,693
2 votes
5 answers
338 views

What would happen to transgender culture/identity if sex were trivially chanageable? [closed]

This is a specific followup to the question 'How would society be different in a world where sex/gender is trivially changable?': in a future (Human, earth) society where (like in the Culture novels), ...
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13 votes
9 answers
5k views

How would dragons mate, according to science?

No, this is not not about courtship displays or dominance figths. (even thought I know that that is also part of mating) This is more of "What their genitalia would look like" and how they would "do ...
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3 votes
5 answers
645 views

Would Simultaneously Hermaphroditic Humans Still be "Men" and "Women"?

When looking exclusively at the muscular and skeletal systems of male and female humans, on average, we'd find what scientists call "sexual dimorphism". Even their voices are sexually dimorphic--...
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  • 14.4k
11 votes
7 answers
3k views

Could a unicorn species have the horn as its male genital?

I want to make my unicorns use the horn as their male genital. Is it biologically possible to put the genital on their head? I know there are many strange genital locations for animals, for example, ...
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  • 8,809
3 votes
4 answers
2k views

is it biologically possible for a creature that can be compatible to reproduce with any creature?

just as the title, my question is can it possible for a creature that can reproduce with any/all creature despite it was different species/family? (not the alien xenomorph or parasite one/way but real ...
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  • 8,809
5 votes
3 answers
494 views

Is there a reason that females passing on more than 1/2 of their genetics to the child would be unlikely to evolve?

On the earth today most animals use a two sex mating system where male and female provide the same amount of genetics to the resulting offspring, despite the fact that in many cases the female ...
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  • 31k
25 votes
23 answers
8k views

How can I identify potential mates (sex organs) without gender?

On this planet there is a species similar to humans with two sexes having differing reproductive organs. The concept of gender is non-existent on this planet. I'm not writing this for any political ...
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  • 375
7 votes
4 answers
377 views

How can sex lead to a boost in performance for competitive sports for men?

Many believe that sex before a competition can have a negative impact on performance in combat, speed and strength sports in males. Athletes from strength and speed sports showed decreased performance ...
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  • 38.1k
7 votes
6 answers
672 views

Is plausible to have subspecies with & without separate sexes?

I'm creating humanoid specie with two subspecies Hairy races - roughly based on humans, chiss, mirialans, with standard males & females sexes Tentacle races- roughly based on asari, twilek, ...
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  • 73
7 votes
7 answers
294 views

Would intelligence affect the evolution of colorful display patters for attracting mates?

On another planet there is a group of organisms that have colorful display patterns allowing them to attract mates. Eventually a branch of this type of organism evolves the intelligence of early ...
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8 votes
6 answers
5k views

Would humanity go extinct if pleasure ceases?

In the near future, the human population is overcrowded and food and water becomes scarce. Every preventative measure failed to address this issue and the world falls into a turmoil and panic is ...
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  • 46k
7 votes
14 answers
2k views

Can a genderless race have sex?

In my world, I created a race that doens't reproduce sexually. They have offspring through the combination of their blood, just blood, from a wound, and a special natural place that must be found in ...
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  • 89
-2 votes
5 answers
842 views

Slaves and used in the sexual profession? [closed]

I ask this question. In a world that was destroyed due to a great catastrophe. A new world order has emerged and the people are governed by a council of 12. This new world order allows slavery to ...
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10 votes
4 answers
783 views

Why would an entire biosphere evolve to reproduce with three parents instead of two?

So I have an alien biosphere in which trisexual reproduction predominates. As far as we can tell, trisexual reproduction does not offer an advantage when it comes to shuffling genes. The biological ...
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  • 7,180
-4 votes
6 answers
444 views

Why might humans and aliens be able to produce viable offspring? [closed]

Jeff is a human. He has two arms, two legs, a head, a heart, and all the normal stuff of a human. This includes a penis. Zhsdfgl is not a human. Zhsdfgl is roughly her species' equivalent of female. ...
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  • 877
0 votes
11 answers
714 views

Representing lust in asexual beings?

How could demons of lust affect/tempt beings that do not reproduce sexually, and have no sexual desire? Like, they can't even be affected by lust magic, their brains simply aren't wired for it. How ...
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  • 305
8 votes
4 answers
598 views

Sexual pleasure in anemophile reproducing humanoids

This species of humanoids has a peculiar way of reproducing. Instead of the usual physical intercourse between a male and a female, followed by the sperm cell merging with the egg cell to generate ...
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  • 237k
5 votes
6 answers
526 views

Reproductive Neck Darts

Yay my second alien sex question, I hope I am not arrested. Context Okay now to nitty gritty, So I got an intelligent species of Ostrich/flamingo looking creatures(this refers only to the shape, very ...
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  • 3,583
6 votes
5 answers
1k views

Bonobo-LIke Social Structure

Bonobos tend to solve disagreements through sex instead of violence, what might have caused this to evolve, or something similar to evolve in a sapient race of humanoids?
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  • 305
1 vote
7 answers
409 views

What would be the ideal deterrent to stop people selling sex? [closed]

Historians have often speculated that prostitution has existed since the beginning of civilisation. It is thousands of years old. In a future where prostitution is a thing of the past, and preferably ...
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  • 1,114
1 vote
5 answers
1k views

Synthesis of Organic Life by a Machine

Given eggs and sperm, and the means to preserve them for centuries, could an artificially intelligent machine possibly produce its own "children", so to speak? Assume it has everything it and its ...
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2 votes
3 answers
468 views

How is natality affected if sex isn't pleasurable anymore?

Worldwide, every single person stopped enjoying sex. They still get attracted sexually but sex is basically frustrating and feels like it's always uncompleted. Nobody has orgasm but still ejaculate ...
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  • 2,642
2 votes
3 answers
1k views

What Would Be Needed To Produce Human Hermaphrodites?

What kind of mutations would be necessary to cause humans to start producing fertile hermaphrodites?
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-1 votes
1 answer
199 views

Should gender be revealed early for a healthy child? [closed]

My Keplerians are externally gender neutral for 5 years. Now genetic testing will reveal gender but they don't do routine genetic testing. Obviously if a young Keplerian goes to the doctor due to ...
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  • 4,045
0 votes
1 answer
376 views

Shorter refractory period? [closed]

What could cause a humanoid race, or even a group of humans, to develop a shorter sexual refractory period (that is, the males can have sex again more quickly after an orgasm)?
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  • 305