Gaste85 finds himself in a tight spot, literally, as he's confined to his truck's cabin during a long, boring drive. His bladder aches, and he can't hold it in any longer. With no other option, he unzips and lets go, feeling the warm relief spread through his jeans. The sensation is unexpectedly pleasurable, and he finds himself growing hard. He looks down at his wet crotch, now transparent, revealing his erection. The sight spurs him on, and he continues to pee, enjoying the taboo act.