Oh about sex, not have sex to...d'oh.
Gosh there are so many songs about sex...Genie in a Bottle immediately pops into mind. Or Baby One More Time.
I think my utmost favorites are: My Neck, My Back (great strip club song) and there's another one that I think was done by Ludacris in the mid-nineties...
IDK, it's something about blowjobs and how he doesn't care if you like pussy or dick just pick...I'll see if I can find it. It's been so long though.