@Violent Hip Swivel, this wouldn't show up under your post so I'll put it here.
I think it's more of a 15 year old's mentality here. There's a cocky lil 15 yo self-centered lil bastard inside of all of us and it's just fun to let him out sometime. I'm sure none of us want to hurt anyone and we damn sure wouldn't be critiquing females' looks UNLESS we were anonymous. Ain't none of us could hold up to the scrutiny we put them thru...haha.
None of them read this site, so there is that level of protection. It's just adolescent fun that most of us have lost. IMO.