No.
However, one time at a large ritzy party, I availed myself of the facilities and was greeted by a previous guest's ... floatie. I tried to flush it away with no success. Frustrated, I quit the restroom to locate and advise the host, but as I was exiting, I saw an attractive young lady patiently waiting her turn. At a complete loss for words, I finally blurted out, "It's not mine!" and slunk away.
Got caught urinating in public?