Questions tagged [sex]

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

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2
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4answers
227 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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2answers
131 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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0answers
106 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 ...
8
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5answers
585 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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7answers
6k 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 ...
2
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3answers
277 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 ...
10
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3answers
559 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 ...
1
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1answer
130 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. ...
12
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7answers
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 ...
0
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1answer
131 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 ...
10
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7answers
618 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 ...
3
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2answers
199 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 ...
44
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16answers
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 ...
2
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3answers
142 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 -> ...
4
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1answer
80 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 ...
7
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5answers
798 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 ...
2
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5answers
270 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), ...
12
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5answers
2k 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 ...
2
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5answers
574 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--...
11
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7answers
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, ...
3
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4answers
1k 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 ...
4
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3answers
381 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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23answers
7k 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 ...
7
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4answers
362 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 ...
6
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6answers
624 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, ...
7
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7answers
281 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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6answers
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 ...
7
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14answers
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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5answers
778 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 ...
9
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4answers
721 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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6answers
417 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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11answers
634 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 ...
8
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4answers
540 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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6answers
505 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 ...
6
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5answers
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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7answers
390 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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5answers
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 ...
2
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3answers
443 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 ...
2
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3answers
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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1answer
194 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 ...
0
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1answer
344 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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2answers
202 views

Increasing the Rate of Multiple Births in Humanoids? [duplicate]

What factors would cause a humanoid race (like, say, goblins, just to throw an example out there) to have a significantly higher rate of multiple births than the human norm? Presumably a large ...
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3answers
157 views

Primitive Fertility Treatments?

We're all aware of modern-day fertility treatments, like artificial insemination and hormones, but are there less advanced ways to trigger ovulation and/or otherwise boost fertility? What methods ...
3
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3answers
1k views

Mating ritual where female chases male?

Mating rituals are various behaviours, serving as a precursor to copulation in almost all animal species. In general these serve to aid the females of the species to pick out a mate. They can be ...
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10answers
3k views

Is a single sex species feasible?

I’ve seen a lot of questions on here about the possibility of more than two sexes but I’ve found nothing on the possibility of only a single sex. The closest thing I’ve found is isogamy, is there any ...
2
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6answers
2k views

Country where men are better looking then women [closed]

For storytelling purposes I need an plausible explanation why men are considered more beautiful than women in a country in the world I am building. So far in every country I have visited in my life ...
1
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3answers
415 views

What would cause an alien species on an alien world to behave in a (specifically) repugnant way?

One of my projects has been developed around the idea that humans in the future visit an earthlike planet in Andromeda. The planet is populated with humanoid creatures that are “well endowed.” Ex: the ...
14
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12answers
4k views

Post apocalypse contraception

In a post-industrial collapse scenario, what would be the most effective methods for contraception? Situation is a small scale civilisation with limited access to industrial materials and tooling but ...
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4answers
559 views

What could cause sex roles to be reversed? [closed]

I'd like to get an idea for what could be the reasons that women were the ones who actively look most on the beginning for sex (meaning that just by physical appearance they'd get aroused enough to ...
3
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4answers
525 views

How could an organism chemically need sex?

Although (as far as I've seen, I haven't done in-depth research) the original/older version(s) of the succubus legend just have them as demons who seduce you, more modern interpretations seem to make ...