Who knew Viagra was a pain killer?

The female dentist pulls out a numbing needle to give me a shot of Novocain.

"No way! No needles. I hate needles!" I said.

The dentist starts to hook up the nitrous oxide and I object. "I can't do the gas thing. The thought of having the gas mask on, suffocates me!"

The dentist then asks me if have any objection to taking a pill. "No objection," I said. "'I'm fine with pills."

The dentist then returns and says, "Here's a Viagra."

I said, "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 on to when I pull out your tooth.”