I think it's perfectly normal, I do the same thing while pleasuring a woman. If you dont like it, show him how you like it. I dont think it's a fetish, just a way to pleasure you.
I think it means he is a pussy who'll never get any so all he does is beat off (crank dat).either that or he is a nerdy white kid trying to act GANGSTA.
-crakn dat
Oh yeah and how's that perpertual virgin thing working out for you?