Found this on Spotify. It's on several albums, including "Benny Hill: The Ultimate Collection."

GATHER IN THE MUSHROOMS
As sung by Benny Hill, ©1961.

1. Now Lucy went down on a farm, tried to milk a cow.
Though she tried, she couldn't the hang of it somehow.
The farmer looked at Lucy and he murmured with a frown:
"Well, now, you just hang on tightly, gal, and she'll jump up and down."

CHORUS: Oh, gather in the mushrooms, put 'em in a pot,
Pop 'em in the oven, and serve 'em piping hot.

2. To make herself more beautiful, she thought she'd bathe in milk.
She said, "I'll have a bathful(?)" to her milkman, Jackie Wilke.
He said, "You want it pasteurized, before I pour it in?"
She said, "No, I'll be happy if it comes up to me chin."

3. The farmer courted Lucy one dark and stormy night.
She said, "You are too old for me because your hair is white."
He looked into her eyes and then he knew he'd have to tell 'er:
"There's snow upon the roof but there's a fire in the cellar."

4. She took him in the kitchen; she was his turtledove;
And then she started cooking dumplings on the stove.
She wore a low-cut dress; ooh! it was as green as clover.
He jumped with glee 'cause he could see her dumplings boiling over.

5. She said, "You give me half-a-crown and I will read your palm."
And then she saw his love-line went halfway up his arm.
So now she's changed her prices, although she's just as willing.
It's big fat men at two-pound-ten and little boys a shillin'.