one time i was visiting some friends at college, and they lived in an all-girls building. for some reason I decided I needed a shower, so I of course used the one in that building. There were all kinds of girls going in and out, and I talked to alot of them from halfway behind the shower curtain.. the whole time I was spanking the monkey while having a normal conversation with them as they came in.
I dont think they knew… and if they did they sure didn’t say anything.