"“put down that awful book” and “those old paintings all had naked people in them.”
I have a suggestion. Don’t try to guess what I think. You’re not very good at it, LOL.
A parent is in a unique position. What goes over as ‘ok’ in some homes might not go over quite the same in Ban the Tele Tubbies land. In some communities, if they approve, even tacitly, of a kid looking at an art book like that, someone with fanatical beliefs is going to twist that around and try to imply they’re a bad parent, and suggest those pictures are the same as ‘topless modeling’ and the other subjects that have come up on this thread. I wouldn’t try to decide for a parent what they should do about that.
I’m in a unique position. As a non parent, I have to tread very carefully when it comes to matters of taste and opinion, and since everyone has a different opinion on this, I’d ask the parents first before giving their teenage, bugeyed son a coffee table book full of ‘Dejuner on the Lawn’, and stuff like that.
If it was my kid, I’d tell them that it’s a lot to think about for a kid, and just to remember to in general, keep his pants on in public, and the rest will become more clear as time goes on.