I'm incredibly curious why that theme bothers you so much that you wouldn't recommend that book to adults. There's a lot of fiction, and erotic fiction, around that theme: would you be against all of it?

I haven't read Anthony, so I don't know how he handles it. But despite cultural taboos, in some sense it seems like a better fit for young (straight) men to date older women, and vice versa. The more experienced partner can teach the less experienced partner. The power imbalance can be abused, but any relationship has the potential for abuse.

Is it just the violation of the cultural taboo that bothers you? Is it the same sort of moral disgust that people feel about incest? Sexual taboos are incredibly fascinating to me.