Books that gave you an erection

So what books have given you an erection? (And I'm not talking about cheap, formulaic romance novels or books of any other genre that is specifically made to arouse you.)

As for me:

*Les Miserables
*1984 (the last few chapters are gold)
*Harry Potter and the Goblet of Fire

Needful Things by Stephen King. There's one chapter where Brian, the main character of 12 or so, has a dream in which he gets a hand-job from his bombshell teacher while he writes on the board. No troll. Here's proof:

http://en.wikipedia.org/wiki/Needful_Things
Sally Ratcliffe: a young, Christian speech teacher. She was very attractive and was the talk of the town, as well as being the object of Brian Rusk's recurring sexual fantasies.