Chap goes to the doctor complaining of premature ejaculation, Doctor says, get a starting pistol and give yourself a bit of a fright just before cumming, and that should slow things down a bit for you,
Month later same chap same doctor, So how's the sex life now ? Asks the doctor, Bloody awful says the man, I was in a 69 position and just about to cumm, so I fired the starting pistol into the air, the wife crapped on my face, bit me on the end of my dong, and the milkman jumed out of the wardrobe with his hands up.