Grandma and Grandpa were visiting their kids overnight .

When Grandpa found a bottle of Viagra in his son's medicine cabinet, he asked about using one of the pills .

The son said, "I don't think you should take one Dad; they're very strong and very expensive"

"How much?" asked Grandpa .

"$10.00 a pill," Answered the son ..

"I don't care," said Grandpa, "I'd still like to try one, and before we leave in the morning, I'll put the money under the pillow . "

Later the next morning, the son found $110 under the pillow .. He called Grandpa and said, "I told you each pill was $10, not $110 .

"I know," said Grandpa . "The hundred is from Grandma!" Very Happy