Boy, this thread brings back a lot of memories! Somewhere in one of my closets I have a big box of Mad magazines I haven't looked at in nearly forty years... Those parodies really do stick in your mind! And, as I remember, most of the classic ones were written by the great Frank Jacobs.

Here's one, to the tune of "My Bonny Lies Over the Ocean":

My body has Calamine Lotion
My body's as sore as can be
The flowers I picked for my granny
Turned out to be poison ivy!

Don't touch,
Don't touch,
Don't touch poison ivy, ivy!

It will
Itch bad
And, it's worse than acne!