When I was 19/20 - Young man, young HOT girl came to door in blanket n'ked....obviously there was some hanky panky going on. But I don't think they were, um, "together", if you know what I mean...CHEATING. So they looked like deer in headlights and they had an expression like they were caught and in deep poop.
Said something like, "um we're kinda busy here..."
I left somewhat quickly, but not before checking to see if I could catch a glimpse of her nip. But alas, they were decently covered :-/ But she was HOT, and will 4ever be in my memories :->