It's just straight up male nature for guys to like girl's butts. And that's a fact.

Plenty of girls check out guys' butts.

tight pants reveal every part of the curves, which is what many guys like to look at. but also females today intentionally tease us guys by twitching your rear as you walk past. it is the twitching, just like a swishing pony-tail or navel charm - a guys eye is attracted to movement

cause guys are sex beasts. They're losers and disgusting !