I can relate to Carl's story (on Oct 17th) of masturbating as an incentive during workout sessions.
I just got done one of my typical sessions of working out. In my basement, I have few pieces of exercise equipment and usually workout to a video or the radio a few times a week. What may make this of interest to solo touch readers is that when doing this, I will usually wear a womans leotard and end up filling it with cum before I am done.
Sometimes, to work up a good sweat, I will actually wear two leotards at the same time - one short sleeve over top a long sleeve, or a short sleeve leotard over a unitard. The nylon lycra ones are best since they are smooth and the warmest. It gives me a good hard-on just putting on these clothes but I refrain myself and continue with my workout-working up a good sweat in them. Then about half way through my session, usually when I'm lying on the mat, I will give in and rub myself on the mat until I can relieve my balls. The feel is fantastic as my cum floods the inside of the leotard against my stomach. After a brief rest, I'll continue my workout (with my cum still inside) and usually conclude by cuming again.
In the end, after I finish my workout and head for the shower, my leotards soaked with a combination of sweat and cum and have the distinct smell of a good time had.