Indeed ...I had .. I never go comando..but that day I couldn’t find a pair of undies, then I head to work . It wasn’t a big deal during the day I was so just the I even forgot I have no underwear, finish work I drove to the gym with only my gym clothes a pair of silky nylon kinda long shorts, a tee shirt similar and six, but no jockstrap or a spare of undies on my gym bag, so I decide to go a head and workout anyway, at first not a problem, but we I hit the treadmill for cardio, things got interesting and grew hard a a brome stick, I hade to put a towel in front of my crotch so I don’t be the center of attention, I guess the rubbing of my cock’s head against the fabric, bounding up and down did it.