Flatulence
A petient goes to his G.P. with an embarrassing flatulence problem. He tells his Doctor that he has a farting disorder which he cannot control. He farts in the most inappropriate of places - in subways, restaurants, libraries. The farts happen inadvertently and is unmanageable.
After hearing the details, the Doctor says “OK, here’s what I’ll do. I’ll stick my finger up your bum and feel around to see what the cause of the problem maybe”.
“OK Doc, but can you stick two fingers” replies the patient.
“Oh, why’s that?” asks the Doctor.
“Because I would like a second opinion”.