Thirsty Much?

So here's an interesting question. What do you do when you catch a patient drinking water out of their already used urinal? Nope. Can't even make this stuff up. Is it wrong that I just sat there until he was finished because he had already drunk half of it due to shock and horror? I sort of repremanded him after I collected myself and told him that I would get him a cup...just ask! And that his arguement that "I rinsed it out" wasn't good enough to EVER drink out of a urinal. I left a couple of cups at the bedside. An hour later he joked that he would pee in the cups. Ha ha.