Jerk and Cum in Sheath Jock Underwear
I jerk off and cum while wearing a pair of jock strap underwear with a sheath - which I designed and made. (Actually, this is a prototype for the final version - which will be furry - to fit and test. ,) Also note that it is after midnight - I'm in a race with a friend to cum as many times as we can on Sunday - and I got a head start. :)