Which is stupid, because there is a kind of orgasm in females that involves uterine contractions, which ironically enough is most easily stimulated by means of anal sex. That one, which neither feminists nor Freud seem to have known anything about, actually has an evolutionary advantage, because it causes the cervix to bend, dipping it repeatedly into the pool of semen inside the vagina.
Um, hang on - anal sex has an evolutionary advantage because it causes the cervix to bend into the vagina......but how does the semen get into the vagina???