No it doesn't although my mate did say the more you wank the bigger your dick will be, then I said by rights my dick should be down on the floor. Of course this is the same guy sayin he's got 9 1/2 inches downstairs. He does like to get it out a lot though, in front of anyone. Looks about as big as me, maybe an inch bigger at most (flaccid) and a lil thinner than mine.
I was thinking though, if you curve your penis, you might actually lose a little length because of the curve...But I've been masturbating three times a day for six or seven years now, nothing too bad has happened, and the curve is very slight. Although my penis is tapered which is weird...thin at the top then thicker as you go down. Hmm