Why does running water make you want to pee or does it really? If it does, is it physical or psychological? It must be psychological because you supposedly outgrow this urge. I remember turning on the faucet while trying to get my kids to pee during potty training days, and being able to resist somewhat.
Also, does just thinking about things like Niagra Falls, Victoria Falls, showers running, toilets flushi… oops gotta go.