three songs about self-pleasure sung by girls
http://www.youtube.com/watch?v=Hb37Nh_Sg4g
http://www.youtube.com/watch?v=-GTkmSJ9Mdw (this one is kind of, for a few reasons, but i really like it, there's a decent remix too)
http://www.youtube.com/watch?v=vm0pqqGUHzM