pinch me

I heard that John Lennon had to "pinch" himself in a very sensitive area (I think you know where) in order to hit the high notes on the song "Gimmme Some Truth". I know that Simon has sung the song live and I was wondering if he ever had to pinch himself for this or any other song. Thanks, Jeanette

"Dear Jeanette, when I have to reach high notes I find that it helps to pinch other peoples sensitive bits. s"