She pulls out a numbing needle to give the man a shot.
"No way! No needles. I hate needles" the patient said.
The dentist starts to hook up the nitrous oxide and the man says:
"I can't do the gas thing. The thought of having the gas mask on suffocates me!"
The dentist then asks the patient if he has any objections to taking a pill.
"No objection," he says. "I'm fine with pills."
The dentist gives him a couple of pills.
He swallows them. "What are they?" he says.
"Viagra," says the dentist.
"Damn," the patient says, "I didn't know Viagra worked as a pain killer!"