> There are hundreds of Harry Potter-related adult porn sites and I can't say
> I've visited them all (who the hell would want to see "Hermione Does
> Dumbledore"?), but in all the regular ones it seems like the most preferred
> background music comes from Chamber of Secrets instead of the other two
> scores so far. Why do you think this is?
It has the most use of the Voldemort motif of the first three. I don't know why that would lend it to porn usage, but it's different in that way.
Despite the popularity of seeing Hermione mounting up on Harry, the better porn sites are the ones with the awesome threesomes between Harry, Cho Chang, and Luna Lovegood. A lot of dick-yanking there!