Guy goes to the dentist to have a tooth pulled.
Dentist pulls out a needle to numb the tooth. Guy says "NONONO NEEDLES!"
Dentist gets out the mask for the nitrous. "NONONO! I'll feel like I'm suffocating!"
Dentist asks "Pills OK?" "Sure" says the patient.
"Here, take this Viagra."
"WOW! I didn't know Viagra was a pain killer!"
"It's not. It just gives you something to hang on to while I pull your tooth."