This is a true story!
When returning to the UK from the Middle East some 24 years ago, I found myself sitting next to an attractive young woman about my age (then). We got talking and shared a few jokes etc.
When the food arrived we had the choice of oysters. I said something along the lines of 'You know oysters make you randy don't you?' She stammered some sort of reply.
After the meal I asked for a blanket and covered us both with it. I slipped my hand between her thighs. She reacted by opening her legs to allow me better access. I spent the next hour masturbating her to one orgasm after another. She returned the compliment once by pumping my cock to a sticky cum. The hostess kept looking at us everytime she went past but didn't interrupt us.
Yes, it really did happen!