So true I don't believe that whole its evolution stuff. It might be based in that a little but as grown adults both men/women can control themselves not to do things like cheating. The avg person isn't going around swinging and killing everybody that gets on your nerves and if we were straight up animals that would be commonplace but its not. We can think but when it comes to sex/things you want people make all kinds of justifications for doing it.
People can be stupid.
When you believe in something, you more than likely begin to base your actions around it.
So you read about how "men are programmed to be unfaithful....blah, blah blah"
You then begin to believe in that so you act as such.
It like teh last girl I was with, she was really REALLY into her "sign". Every day she posts something about her being a Gemini and about what was happening with her sign that day.
If you believe what that stuff tells yo about yourself, you'll eventually begin to mold yourself towards those behaviors/characteristics that it says you should be. If your sign tells you "you're feeling sexy today moreso especially than others b/c of blah blah blah", then if you really into that stuff you're gonna believe it and act on it.
This is the same with movies/TV shows and that's why I've said before in here that women like to believe they are like these characters they see in "Sex & The City", etc.
Peopel like to take away personal accountability and responsibility from themselves.