Little Johnny...

.... woke up in the middle of the night and cried until his mother came in to see what was the matter.

"I have to make pee pee", wailed Little Johnny.

"All right," said his mother, "I'll take you to the bathroom."

"No" insisted Little Johnny, "I want Grandma."

"Don't be silly, I can do the same thing as Grandma," said his mother firmly."

"Nuh-uh. Her hands shake." replied Little Johnny.