Oh don't be a dick, Sacks. We both know it's not because they have breasts, but because they let them hang out in an exaggerated fashion, or because they have minds of their own and are trying to break free from their barely clothed prisons. Not everyone runs around with double D's and the world's smallest shirts.
http://art.penny-arcade.com/photos/7...04_mD2ZG-L.jpg
(not the same genre, but same point)
Let's be reasonable man, KOF doesn't go overboard, but Guilty Gear and Street Fighter? Come on dude. "Flower Kick".