A man visits the dentist. After the dentist examines him, he says, "That
tooth has to come out. I'm going to give you a
shot of novocaine and I'll be back in a few minutes."

The man grabs the dentist's arm and screams, "No way! I hate needles. I'm
not getting any shot!"

So the dentist says, "OK, we'll have to go with the gas, then."

The man replies, "Absolutely not! It makes me very sick for a couple of
days. I'm not having gas."

So the dentist steps out and comes back with a glass of water. "Here," he
says. "Take this pill."

The man asks, "What is it?"

The dentist replies, "Viagra."

The man looks surprised and asks, "Will that kill the pain?"

"No," replies the dentist, "but it will give you something to hang onto
while I pull your tooth."