[falcolas]

I believe, as with most actions (and crimes), intent matters.

You can take a picture of a clothed teenager and it can be perfectly and socially acceptable. Or it can be potentially illegal, based on intent. The same with images taken of nude babies.

Are you creating nude art with the intent of celebrating the human form, or sexual objectification. If it's the latter, do you have consent?

Intent matters, and it will probably be the linchpin for the legality for these discussions.