Why A Man Cheats and....

Ok, so you saw this one coming. lol! Well as long as am wondering, I might as well ponder about this cos I just do not get it. A man cheats and he is just being a guy. A woman does the same and she is a .... you now what! A man can walk out on his child and that's just 'typical' but let a woman try that and she will be branded heartless. DNW really wonders if there can ever really be any 'calming' response to this?