True story. Just married at the age of 23, my wife (then 22) and I traveled by car out to Boston with her parents to scout places to live where I was to be stationed in the USAF. My wife asked me if it was weird using rest areas with her dad. I said, no, it's not like we pee next to each other. She said but, yeah, isn't it weird seeing each other's butts with our underwear and pants down by our ankles. I laughed so hard at that.Cleanest? It's the surest way to end up with a bunch of urine (some of it from previous patrons) splashed on/soaked up by your pants. And if you're a belt guy the end of it could easily end up inside the bottom of the urinal or in a puddle.