In other primates larger penises tend to be directly related to female promiscuity. Gorillas have a 3 inch penis, the females are not very promiscuous. Chimpanzees, especially Bonobos, have larger penises relative to body size and the females are much more promiscuous.


The idea in behavioral biology is that with promiscuous females a longer penis can push the previous sperm out of the way, and get the owner's sperm closer. Therefore, more likely impregnating a female that has had recent multiple partners.


This would give a reproductive advantage to a longer penis in such situations. Apparently somewhere in our past human females were very promiscuous lol, since the human penis is much larger (even an average one) in relationship to overall body size.

Modern variations from the norm, are more likely simply the plasticity of our previously set genetic makeup in regard to penis size. I have not seen any research that supports a direct relationship to penis size and IQ in contemporary humans.

I have heard some women claim that there is an inverse relationship between the size of a woman's breasts and the IQ of the males that attracts. But I have to object to that idea.

That is sad! For both of you...Like your theory.

Can always count on peach to give a well thought out and well written answer

I gotta admit though 3 biggest dicks I ever played with all attached to doofesses