Questions tagged [sex]
For questions relating to sexual reproduction and the physical acts of mating that sexual beings engage in.
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My Medieval kingdom has birth control, why is the population so high?
My world is roughly the same as the middle ages but has a natural form of birth control in the form of a root that can be grown and consumed to prevent pregnancy.
Because of this root, opportunities ...
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Is a species that mates by "tribadism" possible?
In real life, there are planarians that are hermaphroditic, which means that they produce both eggs and sperm, however, they have penises and scrotum without clitorises and vaginas. They sexually ...
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Can I have a world without females?
In this world, most things that could be considered animals or animal-like reproduce in a genderless, sexless, or asexual manner, primarily through processes like apomixis or other means excluding ...
user104995
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Virus that affects only males? [duplicate]
Furrious Rabies affects only males in this universe, in our real universe it affects both genders.
in our real universe I've never heard of any virus that only affects people with Y chromies.
So I'm ...
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What is a plausible sex determination system with males, females and multiple hermaphroditic sexes?
EDIT: I unexpectedly had a possible solution to this come to me, and posted it as answer here. Please look it up and give feedback on it.
I'm trying to come up with a plausible sex determination ...
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Would an asexually reproducing Humanoid species have any form of romance or sexual pleasure?
So I have a setting where the main sapient species is a very closely Humanoid race. In this setting, Humans, along with many other species across a number of dimensions, are all descended from an ...
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What effects would banning opposite-sex mating have on sexuality? [closed]
A load of children/teens developed magic mutations, so the government kidnapped them and locked them away for life. Due to the magic the kids can't be sterilized, and for economic and scientific ...
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Is it biologically feasible for a humanoid species to have both types of germ cells?
I thought up a race of humanoids called Daemons for a Homestuck-inspired video game/webcomic. I won’t go into a ton of detail about them, though if I wanted to, I could fill up nine whole questions. ...
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Can a species with the ZW sex determination system be viviparous?
I imagined a hypothetical species of squamate from the Anguimorpha clade. They are my dragons. They are a rare example of viviparous nonmammalian tetrapod. However, like all anguimorphan squamates, ...
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How many generations could a small group go without suffering the effects of inbreeding
With a group of twelve human couples stranded on a island, how many generations could they go before becoming infertile due to inbreeding?
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Why would dyadic cisgender women with facial hair be considered attractive? [closed]
In my world, there is a revolution in the world of fashion: women, men, non-binary people, and genderfluid people all must have facial hair if they want to be among the elite models. To be exact, men ...
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Would these centaurs be able to copulate with their human genitals? [closed]
The centaurs externally appears very human-like. They have human-like hips with regular genitalia in their natural place. The horse body is similarly sized to the human body, and is connected ...
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How can my sapient sea-star centaurs have four different sexes?
The Cochlequestrians (from the Latin for “snail horse”). are a sapient species much older than humans. They have much more advanced technology than other sapients. They resemble Pierson’s ...
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How could a species have two sex-determination systems?
I imagined a tetraploid species of teleost. This species has both XY and ZW sex-determination systems. I call this strange thing the VYW sex-determination system.
Genetic females have three V ...
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How does interspecies romance work between fantasy races? [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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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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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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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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Why would dyadic cisgender women with a huge belly be considered attractive?
In many modern cultures, the double-cherry-shaped dyadic cisgender woman is help up as the epitome of attractiveness.
In my story, there are sixteen species of the Homo genus (humans) that can all ...
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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, ...
user89947
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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 ...
user88823
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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 ...
user88550
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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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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 ...
user86416
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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