The dentist pulls out a Novocain needle to give the man a shot, so he
can extract the man's tooth.
'No way! No needles. I hate needles' the patient said.
The dentist starts to hook up the nitrous oxide and the man objects I
can't do the gas thing. The thought of having the gas mask on is
suffocating to 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's going to give you something to
hold onto when I pull your tooth out'.