Having no private place to have sex, I used to go to my girlfriend's apartment. She use to tell me "do it on the floor" in order to not mess up her bed. The problem was that it was a one room studio apartment and one day she pranked me by showed up with a bunch of her friends and caught us both stark naked on the floor. "Don't the look cute" they were saying while guys had a party looking at my tits and pussy and girls got all hot and bothered looking at my boyfriend's raging hard on. Having all our clothes collected intentionally to keep the show going we both froze on the spot with embarrassment. By the time we got our clothes, there was nothing we didn't exposed to them. Felt like I was naked in the middle of Gran Central Station with the whole world looking at me. We both had to get dressed in front of everyone and walked out totally stunned and humiliated. Like all naked pranks, they usually go unpunished. I later came to think of it as embarrassing but kind of an erotic experience and found myself pleasuring myself reliving it.