It makes it suspect that the books may have been written by a pedophile (overlooking things like the orgy in IT).

Tbh IT is a pretty strong argument for that… I have only hazy memories from when I read it as a child (very age-appropriate book lol 👌), but I still remember several scenes of children doing sexual activities. Looking back, I don’t think any of it was needed for the story to work - if not a paedo, King was probably drugged out of his mind when he wrote it.