Can't remember where I got this from ( if it was off here I apologise)
A guy goes to the Dentist with a bad tooth & she says I can't save it, it's going to have to come out I'll just give you an injection & I'll extract it for you. He says I can't bear needles so she replies ok I'll give you a general anaesthetic, the guy says no the gas makes me vomit. So she brings him a glass of water & a Viagra tablet, He says will that stop the pain? She replies no but it will give you something to hang onto whilst I'm pulling it out.
I like the story about the nervous young woman who goes to the dentist and says,"Do you know, I sometimes think I'd rather have a baby than have a tooth out." The dentist replies, "Can you make your mind up fairly quickly please because the chair needs to go in a different position."