Hold on...

A Dentist pulls out a numbing needle to give a patient a shot. 'No way! I hate needles" the man says. The Dentist then hooks up nitrous oxide & the man objects "I can't do gas. I would feel I’m suffocating" The Dentist asks if Pills are okay? The man says. ''I'm fine with pills." The Dentist then says "Here's a Viagra" The man says, "Wow! I didn't know Viagra worked as a pain killer" "It doesn't" says the dentist "but it'll give you something to hold on to when I pull your tooth."