its because of men's ego.
over-confidence that is..
i do admit i cheated on my ex-girlfriend not just once before....
i realized why i managed to do it to her, it was over-confidence of myself that was driving me and at the same time my ego.
having that kind of experience and how messed up my life is after that.....
i swear to all saints not just to god alone. that will be the last of it.