A man goes to a dentist to have a tooth pulled. The dentist pulls out a freezing needle to give the man a shot.
"No way! No needles! I hate needles," the patient said.
The dentist starts to hook up the laughing gas.
The man objects again: "I can't do the gas thing. The thought of having the gas mask on is suffocating me!"
The dentist then asks the patient if he has any objection to taking a pill.
"No objection," the patient says. "I'm 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 on to when I pull your tooth!"