Hello fellow TRPers.

I have a quick and simple question for you: I'm searching for a book regarding the evolution of our sexual behavior. I recall that the author was a guy and he was curious if we were truly monogamous or polygamous, so he started studying current relationships and as much as he could about relationships, sex and mono/polygamy throughout history. He also mentioned that men wanna cheat opportunistically and women wanna cheat only during ovulation.

Could someone please provide a name?

Quick edit: I actually remember reading the above description on Wikipedia. (if that helps a bit)