I only remember the chorus, and that in my innocence, #I had to have the phrase "Knocking shop" explained to me. The tune is Poverty Knock.

"Eighteenpence on the bed,
Pleasure for single or wed.
There's none so many
as pretty young Jenny
For eighteenpence on the bed."

Pure and uncorrupted, twelve to the shilling pence of course.

Sorry I can't be of more help. Did Tommy not do some self-publishing or something? Has my brain totally slipped its cogs?