I remember that one, except for a few words I've left as blanks:

"I have often walked my Pierre outside,
But I never liked him in the dirty air outside.
Now he sits upon
His own private john,
That I built for the dog that I love.

See the ____________that I made for him!
See the powder blue pajamas I crocheted for him!
And should he feel ill,
Here's the Contac pill
That I'll give to the dog that I love.

But oh! he sometimes annoys me,
When he does, I'm firm as can be,
Although it nearly destroys me
To have to tell him he can't watch his own TV.

If I _____________________
I'll get maids for him.
And if he should lose his hair,
I'll get toupees for him
And when I drop dead
When my will is read
All will go to the dog that I love."

And a bonus to complete your "Pro Monsters"

"These new monsters ain't true monsters
They've got nothing to show.
If you want to make a girl feel petrified,
To make her scream, and her eyes grow wide,
Tell her that next week she'll be the Wolfman's bride,
Why-ho, Monsters, let's go!