I would suggest that the following is the verse in question. It's one I certainly haven't heard before or heard Mitch talk about on the odd occasion we meet.

"I joined the health service, to train to be a nurse,
With stethoscope and fob watch, with pride I fair did burst,
My charge nurse said he'd teach me, the kiss of life technique,
Well first he turned the lights down and when he began to speak, he said"