Chea! Real talk.
I never really did that sneak shit, but I once jacked off over a girls back when she was asleep. The next morning she had lizard skin and thought it was sunburned.
Never jizzed on an unsuspecting woman before. Seen alot of japanese porn on the subject tho.
once i got shut down on a date so i said fuck it, i pulled out my hard dick and jacked off right there on the couch. i nutted and it turned her on so much that she wanted to fuck, and since i went soft i got some head too.
thanks sound theory!