My wife was reading a magazine she said to me "It says here that 50% of men sing in the shower and the other 50% masturbate and do you know what song they sing?"
"No I don't." I said
"I didn't think you would you ***." she replied.
Mathematically the two activities are not exclusive, it's possible to sing and pleasure oneself at the same time. I'm now thinking of suitable songs to be singing!