the dentist

A man went to the dentist because his tooth was hurting.
The dentist told him after the examination that he need a root canal.

The man replied "O.K. lets do it".

The dentist told him he will feel a pinch when he gives him the injection of the numbing agent.

The man says "No Doc I am allergic to that."

The doctor tells him "O.K. I'll give you Nitrous Oxide."

The man says "No Doc I am allergic to the gas."

So then the doctor gives him 2 pills with a glass of water & the man takes it.

The doctor comes back in 10 minutes & the man says "Doc will those 2 blue pills kill the pain?"

The doctor replies "No, that was Viagra."

The man says "Viagra!, I don’t need that! What’s that going to do for me?"

The doctor replies, "It will give you something to hang on to."