this reminds me of a guide someone posted on LF that taught u how to wank without your hands or smth like that anyway op idk just forget about ur hard cock for a while and it calms down
edit: found the thread, shame it's locked
i asked someone to unlock this for me back then so don't have it but iirc it was something about rubbing your cock in your jeans while moving ur legs in a way that makes you cum, try it op