Sometimes youtube is the best choice if you looking for jerk off material, here is this fat girl, her bra doesn't fit right i think, it's just a tease, waiting to her breasts to pop out. 

http://www.youtube.com/watch?v=03yMxResCHE

 And here is an other one, it has actual nudity in it, it's just amazing how huge tits she have.

http://www.vid2c.com/video/40028744/chubby-blonde-girl-lets-her-big-boobs-bounce?utm_source=referrer&utm_medium=ref&utm_campaign=alexz

I'll probably grab my small pillow, put it into a a bag, fold it in half, spit it it and fuck it like tits.