Https://www.youtube.com/watch?v=mFnmosX-8-I “It’s all about maximising the chances of the male reproducing,” says Sarah Robertson in the University of Adelaide in Australia. The effects are most putting in fruit flies: seminal fluid can make the ladies take in much more, lay additional eggs and become considerably less receptive to other males. https://www.youtube.com/watch?v=mFnmosX-8-I