I am on the down side of life and let me tell you what I have learned.  There is at least one big difference between men and women, even though some people would like us to believe we are all the same.  The difference I have found is that men want to deceive and women want to believe.  The more of a jerk the man is, the more he wants to deceive.  Since most women want to believe what a man tells them, it's easy for a jerk to take advantage of a nice woman.  If you realize that men don't usuually fall in love quickly, although they fall in "lust" very quickly, you may save yourself a lot of heartache.  Hope this helps.