Striptease at the gym - from sweaty Bumchums singlet to totally naked and hard

IU don't wear this BUmchums singlet when the gym is busy because, as you can see, it becomes totally transparent. Then I figured, after a 5km run, if I am that sweaty, and the gym is empty, why bother wearing anything at all. Then I figured, now I am naked, and it feels good to play with my cock, why don't I play with it a bit more.