>>714465770You said it yourself, he fantasizes about it.
People fantasize about all sorts of taboo things, because they find the taboo nature of it arousing.
If they actually do these things in real life, then that's different. Children are undeveloped and vulnerable people, and should be respected as such regardless of what we think about them instinctively. But in the end, we as men do see beauty in youth, and some of us do go to the forbidden zone in our minds, because we shouldn't.