There are plenty of studies out there on human sexuality that seem to assume that evolution hasn’t quite caught up with all our modern sexual tinkering, seeing as how they start off assuming all sex, and all our sex drives, stem only from a fundamentally a reproductive urge (this one, which that claims that women who are approaching menopause become “more willing to engage in a variety of sexual activities to capitalize on their remaining childbearing years” is what spurred my thoughts today) There are points where this makes sense–genetically-driven instinct won’t catch on to the advent of The Pill for a few millenia to come. But other purposes for sex, and forms of non-reproductively oriented sex, have been around for more than enough time.
Queer sex, oral, manual and anal sex are OLD. Judging from our closest living relatives, all those ways of fucking are older than we are as a species. Our hind brains may not have picked up on condoms yet, but ‘I don’t want to get pregnant, so how about you go down on me instead?’ is older than time.
And why should all sex be driven by reproduction? Humans do, and probably always have, used sex for lots of other things–for fun, to strengthen relationships, to ease tensions (and did I mention for fun?). We’re social creatures, and our gene’s survival depends not only on our ability to churn out babies, but on our ability to gain the love and support of others. With fucking. Or sharing food or whatever. But fucking is free.
I’m not an expert in human sexuality, so I’m curious: is there any evidence that having more not-PIV-sex is strongly correlated to having more PIV sex and higher pregnancy rates? If there’s not, wouldn’t it be important to distinguish between sex-in-general, which may or mat not include PIV sex, and sex that’s actually able to lead to pregnancy, when you’re doing research on sexuality and reproduction? Because it’s not a good idea to assume that when you ask someone about how often they have sex, or how intense their sexual fantasies are, that their personal definition of sex is all missionary, all the time.