Dental Checkup

A man went to the dentist to get his teeth checked.

While he was sitting in the chair being examined, the dentist said to him:

- Have you done oral sex lately?

The man replied:

- Why yes, I did this morning actually. How could you tell? Have you found a pubic hair stuck in my tooth?

The dentist says:

- No, not quite. You've got some shit on the end of your nose!