To all the straight guys turned on by shemales and big, hard dicks
This is a bit descriptive so if you get queasy with biological terms, you've been warned.
So just saw part of a lecture on ytube about something called sperm competition adaptation.
It goes like this: a chimp sees another chimp about to get it on with a female chimp. He sees the big, hard dick of this other chimp who is about to have sex. The sight of another male's big hard dick makes his one spring into action too. Why? Coz he is getting ready to get in there with the female chimp after this first chimp has finished and wants to fuck her so hard that he cums so much that the other chimp's sperm gets flushed out. Chimp and human dicks are shaped in this shovel shape apparently to shovel out the last man's/chimp's semen, and the dick goes flaccid after ejaculation so as not to shovel out their own.
So basically the hard-on the chimp gets when seeing another chimp's hard-on is due to a heightened sexual aggression in order to compete and make sure he gets the female chimp pregnant. So being attracted to big hard, dicks makes you even straighter? It means you are even more alpha and even more into fucking a woman, it seems.