Girls what would you do if your partner asked this in bathroom?

Ok this is the dumbest shit ever. In my country when a girl says that she has to pee, some other girl always says jokingly "get it out(your p*ssy) and pee in my hand." This means " Why the fck are you telling me this as if i can help you, fck off to the toilet." However when i heard this i imagined this happening for real and it turned me on. Like, a girl putting their p*ssy in my hand, me gripping it tightly, and her peeing in my hand... Does this kind of kink even exist? ヽ(`Д´)ﾉ