@RDC I think IT is among his best work. (Even if, yeah, I'll give him some shit for making Will such a self-insert.)
The thing about King is that he's such a... I dunno. His process is always so freeform, coming up with an idea and then just putting in the hours to write it. He doesn't really 'do' outlines, and y'know, it shows sometimes. (Often at the end!) The kid-sex thing... I see what he was trying to do, how he had the idea, and he isn't really the sort to really sit down and think over if it's a good idea. It winds up weird and jarring, and kinda dominating discussion of what's otherwise a great book with like two pages of concentrated WTF? out of 1100.
(King is also, like, the worst PSA on the planet. "It was out of control, the booze, the drugs. I'd lose days, come to from a blackout, lying next to a NYT best-selling manuscript and a film deal.")