A man gets his new prescription for Viagra, and starts home to get ready for when his wife gets home.
He calls her on the phone, and she says, "I'll be home in an hour."
"Perfect," he thinks. The Doctor told him to take his Viagra an hour before, so he takes the Viagra and waits. Well, an hour goes by, the man is ready to go, but no wife...
She calls him on the cell phone and says, "Traffic is terrible. I won't be there for about an hour."
The man, frustrated, calls his Doctor for advice. "I've got a hard-on a cat couldn't scratch off and my wife won't be home for another hour! What should I do?" He asks.
The Doctor replied, "It would be a shame to waste it. Do you have a housekeeper around?"
"Yes" the man replied.
"Well, maybe you can occupy yourself with her instead?" Said the Doctor.
The man then replied with dismay, "But I don't need Viagra with the housekeeper..."