I see “Nick and Charlie" mentioned in an article. A book about two gay boys that get drunk and fool around.
If you just look at the cover it is going to be super triggering to some repressed parent. Especially since many of the fathers are going to have unexpressed homoerotic fantasies themselves.
To me, the whole thing seems like a huge unproductive distraction from actual learning. Imagine if parents gave a shit about the math books to this degree.