This is a damn good topic, my usual playlist isn't that fuckable, and it's damn hard to come up with something that sets a good mood and doesn't sound like crap.
I don't think most people plan ahead on this, but if my laptop is next to me or I'm using it, I'll turn on some music by Three Days Grace. The anger/voice in it gets me turned on. I don't know why. :)
Edit: Oops. I thought the question was what you masturbate to..
Fap is used for guys when they do it solo. What's the term for girls?
I actually never really thought of that lol we should come up with a word for girls but the word fap comes from the sounds that it makes. So, um how would you make a word out of what that sounds like. xD