and can make a good session last more than two hours and provide several powerful orgasms. 
Frequently I combine masturbation and my (almost) daily exercise and dumbell workout.
While masturbating with one hand, I will use the other with a 20 & 35 lb dumbell to do curls, presses, extensions, etc.
I find that the excitement of aggressive masturbation and the tolerance to pain that accompanies approaching orgasm combine very well to provide the extra push and greater muscle burn and several "extra" reps.
I must be careful with the toes, because when I finally cum and the arm is totally spent, the weight drops. Released of the weight to stretch the tightening muscle, the arm draws toward my groin where I immediately employ it while I exercise the other arm.
Before you wonder,
I also exercise without masturbating, of course. But the combination can be truly mind - and body - blowing.
Does any body else do this
