There used to be a man with his c**k in his hand.

The story:

I was at the play "We Will Rock You", in the front row. When they started singing Headlong, and it came to this line, I was singing along (as I had with every song). Suddenly my date was rolling back and forth in her seat because she heard my "wrong lyrics". Nearly disrupted the entire play because all of the actors were staring at her as they sang.