Ass is safe, women don't find large asses threatening, rappers promote ass, and they even receive approval from the gays(ie fat bottom girls), saying you like ass isn't seen as creepy, it even makes you look progressive since fat and ethnic woman typically have large asses. even children movies have big butts

Tits on the other hand are more problematic. They have become the go to factor in determining genetic rank among women and thus have become despised by the small breasted majority. Since only hetero white guys like tits so you rarely see it in media unless they are trying to recruit young men to die in the middle east (tap sign), saying you like tits makes you look sleezy and the impression of large breasts is so poor that women typically get a reduction to improve their social standing