^ Merely out of curiousity, as an English usage question, why don't we just say, "I masturbated watching Dolly Parton hundreds of times while," etc.?
Maybe it's just easier to write.
Maybe it sounds nicer.
Maybe it's just more on an "in" usage right now.
Saying "I masterbated to..." sounds kinda clinical.
Considering that there are many different slang terms that people use for jerking off (there's one now!), and few of them new, I'm surprised one would question that usage.
Now, if you'll excuse me, I'm off to choke the chicken...