A thought about normal sexual behaviour. “Normal”, in the statistical sense, has nothing to do with “healthy” or “morally sound”. It simply means “the most common range of values in a variable”. Now, across all of child-bearing age humanity, what is the normal attitude to getting sexually penetrated? Is it yes please or no thanks?
In the patriarchal tradition, getting penetrated hardly even counts as sexual activity. It’s just acceptance: not thrashing about, kicking at balls or running away when somebody with an erect penis shows up. Being sexually active, in this view, means putting your penis in someone, and so only males can be sexually active. Cf. the telling expression “passive partner”. But really, to the vast majority of penetratees, it’s not just something you put up with. It’s something you long for and seek out. This hard-wired desire is evolution’s way.
There are currently about 101 human males per 100 human females on the planet. For a variety of reasons, including homosexuality, some percentage of women say no thanks to penetration. On the other hand, a considerable percentage of gay men say yes please. In fact, estimates of how prevalent homosexuality is suggest that it is considerably more common among males than among females. Thus it seems that if you ask a random sample of childbearing-age people if they enjoy getting penetrated, the statistically normal response is most likely yes. Or in other words, people like myself who turn down kind offers of penetration are a sexual minority.