Why is it that men become heartless?

Why is it that man become heartless after going though a bad break up with a Girl they really loved... and seem to treat all the other girls that come after like crap? Why do they do to the girls what their xgf did to them? Why do they close their hearts to other girls ?Why is it hard for them to give it (love/ GF) another chance?
Why is it that men become heartless?
21
6
Add Opinion