We sang the Lollipop verse pretty much as written above, but with the last line as "Lollipop for me -- not you, but me"

And then the castor oil verse as above:

It's a lick on a spoon guaranteed to kill you soon
Castor oil for you -- not me, but you.

In the bubble gum verse we sang

"Man who made it must have been a bum" (rhymes better)

And then,

"It's a mess on your face guaranteed to stay in place"

We also sang a Hershey Bar verse:

H-E-R-SH-E-Y (You have to sing the S-H fast) B-A-R spells Hershey Bar.
That's the only decent kind of candy
Man you made it must have been a dandy
H-E, etc
B-A-R, you see
It's a snack in a pack
Guaranteed to make you fat
Hershey bar for me -- not you, but me.

(Hey, I didn't write it.

I've never heard the Davenport verse.

And, at my camp, the lemon drop song was completely separate from this one here with the "Harrigan" tune.