A man goes to an oral surgeon to have a tooth extracted. The dentist pulls out a local anesthetic needle to give the man. "No way! No needles! I hate needles!" the patient said.
The dentist starts to hook up the nitrous oxide gas and the man again objects.
"I can't do the gas thing - the thought of having the gas mask on is suffocating to me!"
The dentist then asks if the man has any objection to taking a pill.
"No objection," the patient says, "I am fine with pills."
The dentist then returns and says, "Here's a Viagra tablet."
The patient says, "Wow - I didn't know Viagra worked as a pain killer!"
"It doesn't," said the dentist, "but it will give you something to hold onto while I extract your tooth."