Https://www.youtube.com/watch?v=mFnmosX-8-I Seminal fluid alters gene expression in females, which includes human beings. It can even change behaviour in fruit flies, but does it do the same in women? Despite the fact that there is some evidence that there is really a positive romance amongst semen retention and testosterone levels, a https://www.youtube.com/watch?v=mFnmosX-8-I