frakkin
I'm pretty sure that guys like boobs because they look like a butt. Back before humans had evolved, our primate ancestors walked on all fours. This allowed the female's a** to stick out, and all a male had to do was look or sniff at it to find out if she was ready to go. Since humans walk on two legs, we don't push our behinds out as much as before. So our breasts grew to larger sizes instead, and men look at those now. It's also why some men are a** men, rather than boob men.