The contrast you mention is so utterly bizarre. Graphic acts of violence are frequently displayed on mainstream television. Graphic, gory, bloody stuff. Gun shots, autopsies, dismemberments, pools of blood... I feel creepy just typing this sentence. I've seen maybe three full episodes of CSI and in one of them I remember them showing a shot of a knife-tip breaking off after getting stuck against a person's rib. It was shot from INSIDE THE PERSON'S RIB CAGE. And think about the time Justin Timberlake ripped off a velcro costume-part expsing Janet Jackson's tit. Less than a second of boob and a metal-adorned nipple and the whole world goes apeshit.

Violence is antithetical to the human condition. Sex is not. (some may take issue with that first sentence, and I would agree, but so rarely has violence progressed humanity in non self-defense situation)

You're right, dude, it's nuts. Breast-feeding is as innocent and human as it gets. It's nepotism to the extreme! The sick fucks out there that sexualize it should have their nuts clipped and cauterized.  

Why, though? Have we de-emotionalized violence whereas sex is still wrapped in mazes of emotion? Is that it?