I broke a glass and cut my finger washing glasses behind the bar one night and put a bandaid on it. Later i made a guy a drink and handed it to him. Just as he took the first sip I saw the bandaid in his glass. As soon as he put it down I grabbed it and got it out of sight. He still had his hand on the glass when I grabbed it from him. He was
really irate, I told him I thought he was finished with it and I apologized and made him another one, on the house, but I'm sure without the blood it didn't taste the same.
He never knew about the bandaid.