[JohnW]

OK clue time. This was from the early sixties. I've put extra letters in to help.


M---'s is the best b---- ---
best b---- ---, best b---- ---,
M---'s is the best b---- ---,
Let's have one now.
Say M---'s b----, M---'s b----,
Say M---'s b----, M---'s b----,
M---'s is the best b---- ---,
Let's have one now.