Going for a filling 
This from the in box may help
Hard times at the Dentist's. A fellow goes to a female dentist to have a tooth extracted...
As She produced a large syringe to give him an anesthetic shot, the bloke Protested,
"Sorry, but no way, NO needles..!
I just hate needles..!"
So she started to hook up the 'nitrous oxide' tank, but again he said, "No, no, I CAN'T do the gas thing either...
"Just the thought of having a mask on my face suffocates me..! ”
The Dentist then asked if he had any objections to taking pills...
"No problem at all," he said, "I'm fine with pills..."
So the Dentist gave him two little blue pills, which he swallowed Promptly...
"What are those..?" he asked...
"Viagra ," she replied casually...
"I'll be damned," said the patient, "I didn't know Viagra worked as a pain killer..! ? "
"Actually it doesn't," said the Dentist,
"But it WILL give you something to "hold on to when I pull your tooth out..."