I remember:

Mary had a little lamb
She thought it rather silly
She threw it up into the air
And caught it by its ...

Willy was a watchdog
Lying in the grass
Along came a bumble bee
And stung him on the ....

Ask no questions
Tell no lies
I saw a policemen
Doing up his ...

Flies are a nuisance
Bugs are worse
And that is the end
Of my silly little verse

mcmoo