I think you've given a darn good answer there Hollie.  The base desire of the male is to spread his sperm...the sex drive is to procreate and the baser the male the more he thinks with his sex organ instead of his heart or his head. 

Once he evolves, he learns the finer points of living and embraces the idea of loyalty and keeps the feelings of his spouse uppermost in his mind/heart.  He learns the dignity that comes with maturity. 

 Then he makes a good husband to his wife and father to his children. It's not one group over another as you said, "it's men in general."  Women are the nesters and men are the braggarts. Not all of course....but "generally" speaking.