What an interesting thread...
My husband and teen daughter are both artists. Both have done life drawing. I’ve posed for life drawing, but never naked for my own child. Neither of them would pose naked or legs open for each other. It crosses accepted societal boundaries, and possibly legal ones, for adult human male family members to see children or very young adults in vulnerable positions. I’m not sure they should be given excemptions from our typical accepted standards of appropriate behaviour, solely on the grounds they’re an artist. A photographer would likely not be able to take photos like this of his 17 year old daughter, as the daughter was at the time this painting started.
Being hesitant to just accept the word of a minor or just barely adult young woman that it was fully her choice and that that choice was healthy and appropriate, does not equate to sexualising all nudity. It’s taking a careful and considered approach to child safeguarding, which covers grooming, and is not just limited to sexual grooming. It is, in my opinion, highly likely it was coercion of some kind. Mostly to make herself vulnerable to him, even if he wasn’t doing it for sexual gratification he was certainly the one holding the power and my concern is that she was indeed groomed and his intentions were not within most people’s boundaries. Does it make it illegal? Likely not. But morally speaking it’s clearly worthy of robust debate and any contributions dismissing the debate as childish, prudish, hypocritical etc are in the minority of public opinion on the matter. Doesn’t make your opinions less valid and it’s important opposing opinions are heard and expressed. While initially disturbed of those arguing in Freuds favour, as I am of the strong opinion this work overstepped what is appropriate, it is interesting to hear why you think this way. I am very careful though, because many artists are excused of what is legally child abuse, simply because they’re artists/musicians/actors. You need a better platform than ‘ it’s art’ to make a case for this piece being acceptable.