The singer begins with number one, "when the fun has just begun," and progressing to number ten, when "it's time to start again."
This is perhaps the most popular formula song in the English language. - EC
Hugill thinks this derived from the shanty "Put Yer Shoulder Next to Mine and Pump Away," with which it shares a tune. I wouldn't be surprised if the kinship goes the other way. Even more likely to be a descendant is "Kissing Song (II -- She Just Kept Kissing On)." - RBW