My understanding --- which I can't in any way back up --- is that exposure to nudity was pretty much the norm for most of human history, in that families lived together in single rooms.

It's the (accidentally or otherwise) killing people part that bothers me about this.

I've studiously avoided exposing my (now 10.5 and 8.5 year old) kids to sexual material because it's unpleasant for me to have to deal with the questions (though the boy's pretty much already gotten the details formally now).

But violence still bothers me.