Let's check my RSS feed for fap material...
Achewood, no.
Girly, maybe.
Dilbert, no.
See Mike Draw, no.
Dresden Codak, only when Kimi shows up with overalls and nothing underneath.
Erfworld, hydrocephalic fetish is fail.
Goats, no.
Gunnerkrigg Court, I <3 Surma.
Nodwick, no.
Minus, no.
Malfunction Junction, no.
Order of the Stick, no.
Penny Arcade, russian ping pong chick is win.
Scary Go Round, skinny.
Shortpacked, no.
Starslip Crisis, he draws pretty creepy chicks in bikinis.
Questionable Content, maybe.
Nedroid, maybe.
Nobody Scores, no.
PBF, no.
Necessary Monsters, we'll wait and see.
Ugly Hill, no.
XKCD, HURF HURF FERMAT'S THEOREM UNF.
AmazingSuperPowers, no.
Simulated Comic Product, no.
Truck Bearing Kibble, no.
Girl Genius, if only Foglio drew heads less oval.
aaand Rumblo feed and Schlock Mercenary and Zebra Girl. Zebra Girl is fap worthy I suppose.