>>13885 Well there is a manga on exhentai that I trying to find where a guy is trapped on elevator and the girl has to use the bathroom. So the guy ends up being her toilet. I don't know if this is you fetish but I like these kinds of stuff. There is also another one where a girl next door go to the protagonist house to pee but his toilet is clogged, so he end up being her toilet. Not quite what you described but that's what I thought it was.