For guys only (or possibly bi-girls) these are some of my favorite songs to jack off to :-D
They are unusual in that they have only female vocals; masturbating while a big butch male vocalist is telling me to "get it on" is a bit off-putting so these are great, even if they aren't necessarily good songs they are very sexy:
My Boobs Are OK - Music Video. Funny and very hot!
Destination Unknown - Music Video. You'll find it on YouTube or Veoh, it's the one with the marching-band girls.
Princess Superstar vs Mason Perfect Exceeder - Music Video.
Okay, so it features half naked men than it does the girls (why why why!? Ii was obviously meant for men so why all the male flesh??!)but the girls talk dirty and the song is pretty hot.
Special D: Come (Cum) With Me. You'll probably get the same idea as me and edit out a few seconds of it but it's very sexy.
Bass Erotica: Lust In Bass.
This one is a very old CD that's hard to find but it has two good tracks on it: E.M.P (Eat My Pussy) and Lust In Bass.
Holly Valance: Kiss Kiss
Quad Queen: Queen Of Quad. Another hard to find CD from circa 1995. Good tracks: Sound Of Me Cumming, Naughty Girls Need Bass,Keep Pushin' Harder.
Roobie Breastnut: Cum On Me, My Three Holes,Spank Your Monkey, Hustler Me, Pink Pussy Trot.