The thing is, most of the time when you’re coming pretty close to doing it with a girl, she keeps telling you to stop. The trouble with me is, I stop. Most guys don’t. I can’t help it. You never really know whether they want you to stop or whether they’re just scared as hell, or whether they’re just telling you to stop so that if you do go through with it, the blame’ll be on you, not them. Anyway, I keep stopping. The trouble is, I get to feeling sorry for them.
– J. D. Salinger
The Catcher in the Rye. Holden Caulfield in Chapter 13.