A guy goes to the dentist because he in pain and the dentist tells him that he needs to have treatment and that he will have to give him an injection.
The guy says, “No, no, I can´t have an injection, I am terrified of needles!”. So the dentist says, “OK, I will have to give you gas.”
The guy says, “No, no, the gas mask makes me feel sick.”
So the dentist says, “OK, are you alright about taking pills?”
The guy says, “Yeah, that´s fine.” And the dentist asks him, “Can you take some Viagra?” The guy says, “Yeah, that´s fine, but I didn´t know that Viagra was a painkiller.” So the dentist says, " No, its not, but I just wanted you to have something to hold on to while I did the treatment."
