2009-11-01, 11:25 PM
It depends on how you move your arm (depending on the position, or the individual's penis size, the arm may move a lot, or it may not move much at all), how long a single session is (some people enjoy working themselves up and then stopping, while others just go all out and finish in a quick burst), and how fast you move your arm (this goes back to how long a session is).
Having said that, I would not recommend fapping as a way to gain muscle strength in the arm area. When I was a young boy and my father took me into his room to show me how to fap, I did it a lot afterwards (who doesn't, at first?), and never seemed to develop muscles in my arms from it. I still haven't, and I'm older now.
Having said that, I would not recommend fapping as a way to gain muscle strength in the arm area. When I was a young boy and my father took me into his room to show me how to fap, I did it a lot afterwards (who doesn't, at first?), and never seemed to develop muscles in my arms from it. I still haven't, and I'm older now.