My Grandpa had a problem
Let me try to explain
When he made love to Grandma
He just couldn't sustain
My Grandpa took Viagra
It worked like it should
You'd think now that Grandma
Would be feeling pretty good
It's a funny thing
You may think this quite odd
Since Grandpa started taking Viagra
She's taking it very hard
Not that she's complaining
Do I need further explaining?