Grandma and Grandpa had come over to visit their children and were staying the night. While rummaging through the medicine cabinet, Grandpa spotted a bottle of Viagra. He asked his son if he could try one, but his son hesitated, warning him that the pills were quite strong and expensive. “How much are they?” Grandpa inquired. “Ten dollars each,” the son replied. Grandpa wasn’t bothered by the price. “I still want to try one. Don’t worry, I’ll leave the money under the pillow before we head out in the morning.”
The next day, when the son went to check, he found $110 tucked under the pillow. Surprised, he called Grandpa, saying, “I told you the pills were $10 each, not $110!” Grandpa, with a grin in his voice, answered, “Oh, I know. The extra $100 is from Grandma!”