I drove a lot back and forth to visit friends right after college…often on sundays on the way home I’d listen to porn through the car stereo and would get rock hard - practically ripping my underwear in the process (I grow pretty big and thick so things get tight when I get hard in undies)…luckily I usually would just be wearing the shorts I’d slept in, so I’d whip it out. Usually it would just go soft after being out for a little, but 1 time it was leaking pre like crazy so I used it as lube and busted a huge nut all over my chest, etc.
I doubt think anyone saw me that time but was def seen by busses and truckers etc other times…