So I have been reading a lot of Hentia manga lately and one thing I have noticed about them is they have an obsession the cervix being poked, speared and variously abused. It's one of the things that really takes me out of a story. Mostly because the cervix is not something that should be poked and prodded with wild abandon. Hell, I even used the fact that a characters cervix was getting hit and it DIDN'T hurt as a way to show how deeply under a pretty literally spell that character was. I have noticed that it is something that turns up in a certain kind of story, where the men have comically oversized cocks. It seems like a for a lot of guys out there they see it as a mark of pride that they can hit the cervix. Which has made me kinda tempted to work it into a story, since usually if a guy can hit a woman's cervix it's because she really ain't that into what is going on. I don't really have a point to this, it's just something that has been on my mind.
It's worse than you know, and, also better. https://anatomychartee.co/image/108...system-diagram-labeled-side-view-anatomy.html As you can see in the image linked above, the uterus is not connected at the back of the vagina, but rather, ABOVE the vaginal canal NEAR the back. So, not only would he have to force open the uterus, which would be agonizing, but, more importantly, his cock would need to make a 90* turn MID-THRUST to do it at all! Now for the good news: smacking into the cervix would, yes, be exceedingly painful. Brushing against it in the course of normal sexual contact, however, I have it on the authority of every woman I've ever made love to, is, when done correctly, intensely pleasurable! This only makes sense, because, based on the evolutionary parameters of human male anatomy, a penis which will brush the cervix on its way past indicates a superior specimen. Ergo, women who enjoyed the sensation were more likely to have their DNA carry on to the present day.
YOUR BIOLOGY HAS NO HOLD HERE! (Also I agree. Cervical penetration is not really realistic.Although I think I have been guilty of it in the past.) Edit: In writing. Not real life.
The Japanese are a very repressed and sexually awkward culture... Also, that image is fucking disturbing. Also also, what the hell is it with the Japanese and having Black Holes in your body? https://gfycat.com/FantasticNimbleKookaburra Also, also-also, what is with the idea of people literally getting sucked into a woman's vagina? Where does that become fun?
They're genetic. I know the fetish itself is called Unbirth or Unbirthing and it's pretty much restricted entirely to fantasy and fictional writing for obvious reasons. ...why it's a thing? I don't know.
With arousal, the "depth" of the vagina changes and touching the cervix at the beginning of intercourse doesn't mean you will all the time. I guess it can hurt like hell, though not everyone will feel the same and there may be even some women who enjoy it either because of a lighter pain or because of they just like (that kind of) pain. Humans are individuals (most of the time). Entering the womb while normal intercourse is surely impossible. (Though there may be other ways...) Btw I don't like such unrealistic things and dislike overly huge cocks as well. Again, I have to disagree with your evolutionary assumptions. What makes a huge cock superior? A cock just has to stay inside the pussy to dump the semen. Yes, the longer it is, the more likely that will happen. But... a bigger cock would mean that you have to provide more blood/pressure which would make the reproduction more exhausting, making the male more vulnerable to become a victim of a beast of prey or to get defeated and replaced by another male. Additionally, the absorption of cum from the vagina to the womb should benefit from the female having an orgasm as the muscle contractions would make the cervix kind of suck up the semen. If the cock hits and hurts the cervix, giving the female unpleasant pain, she'd more likely not orgasm and rather avoid reproduction.
Ah, but! You are forgetting that in pre-sapient species it is extremely common for females to mate with multiple males in a single day! The glans of the penis, in a specific its ridge, is designed to push deep in, letting the semen of any rival male the female has mated with slip past on the in-stroke, then catch it and pull it back toward the opening on the out-stroke. This has, over to time, resulted in human males having the largest average penis size of any primate relative to total dimensions of the body: because, when a woman has multiple partners, he that has the largest cock is most likely to be the successful inseminator. Bigger really IS better! (Up to a point, of course...)
It is true that some people can get pleasure from something akin to what I was talking about. I should have made it more clear that I was really taking about stuff where it is foreceful. In comic form it takes the extreme of the cock literally entering the vagina. In written erotica it tends to be them talking about "Hitting" the cervix. I get that there are people who are into that sort of thing but for me it has ruined a few stories for me.
The human penis is large only compared to our closest primate relatives. If you look at all primates, including monkeys, then the size of our penis isn't actually exceptionally long. For example, the Hamadryas baboon has an erect penis of ~5 1/2 inches long. Slightly shorter than the average human male, but they're only about 1/3 the size of a human. Our penises are also not really that complicated. It doesn't have lumps, ridges, flanges, kinks or any other exciting feature that other primates have. This simplicity is typical in monogamous species. On top of that, Testicle sizes is generally a good indicator of sexual competition within a species and in this area humans are quite lacking. Smaller testicles means less sperm generally indicates less competition amongst males. Two ends of the spectrum: Gorillas have a polygynous system(one dominant male to several females) and their testicles are minuscule compared to the rest of their body. Meanwhile Chimpanzee's have a multi-male to multi-female system(male chimps have sex with any females any time with any excuse) have much larger testicles compared to their body size. This points to primitive Homo Sapiens probably adopting a polygynic system rather than a multi-male/multi-female system that eventually evolved into a monogamous or serial-monogamous system as most societies historically have adopted one of these systems or the other.
Only the patriarchal ones... In matriarchal societies, multiple-male/multiple-female systems are not unknown. Moreover, the further back in the record you go, the more common they appear to be. My belief is that there was a significant period where they were the norm, which explains the tendency of both males, but more significantly females, to cheat. It also explains multiple aspects of the structure of the human phallus more simply than any other explanation I've seen advanced.
Probably the ridge of the penis works like that, though I think the main advantage is that he doesn't slip out easily. Similar to an arrowhead. The assumption about multiple males would require that the females would have had kind of regular gangbangs where the smallest cock started. If you assume that the strongest males have had the biggest cocks, they would have been rather the first, while the smaller ones could have taken their chance afterward, which would basically have the opposite result. If it is more like one male every six hours, the semen would already have found its way, either inside or outside. Also, if bigger was always better, today the range would surely be closer together. It's like with the pandas. The weakest form which can just survive in its environment is the evolutionary strongest. Yes, the vision of the uterus getting fucked is quite a turnoff (like every outright unrealistic scene)
Yes, I find this a problem as well, especially one of the related incidents: when a woman's belly 'expands' with semen or alien eggs. Do you know why women get stretch marks from being pregnant? It's because the skin can't accommodate the expansion of the uterus and splits, eventually being filled in with scar tissue. Every time I see someone claiming "her belly swelled like she was pregnant" I just can't read any further: because that character just died...
I actually enjoy cum expansion. I think it might be because it is on another level of unrealistic. Although it has to be in a story that involves humanXmonster or the like. I don't like it in stories that are meant to be taking place in the "real" world between "real" humans. However, give me a big hairy Werewolf that presses me to the ground and pumps me full to the brim any day of the week.
There are times when I just want to write something that is just every cliche and ridiculous anatomy distortion I can, just to try it out. Almost a parody version of a regular story.
Eh, everyone’s got their kinks and their limits. I personally find incest and raceplay absolutely impossible to stomach, so I just don’t write ‘em. But, as my name would imply, I love ovipositors, eggs, stretching etc. From feedback from fans I would guess that this kink skews about 55/45 female/male, or even 60/40. So not everyone is squicked out by it. Some are— my wife can’t bear to read my stories (and I don’t blame her). But plenty of people enjoy the fantasy. I usually involve magic or mad science to explain the biological impossibilities, but sometimes I just hand wave it. When you’re writing about monsters, aliens and demons, disbelief can be considered suspended.
