A bloke goes to the dentist, and as the dentist prepares the injection, he says he doesn’t like injections as they make him freak out.
The dentist puts away the needle and prepares the gas, but the bloke says he can’t have gas.
The dentist thinks for a bit, then leaves the room returning a short while later with a pill and a glass of water.
“What is it?” asks the bloke.
“Viagra,” the dentist replies.
“I didn’t know Viagra was an anesthetic!”
“It’s not,” says the dentist, “but it will give you something to hold on to while I pull your tooth!”