slipped and accidentally cut off one of the patient's testicles. With the patient still under anesthesia, the surgeon decided to replace the missing testicle with an onion and hope that nobody would ever know.
A few weeks later.................
Surgeon: "How are things?"
Patient: "Not bad, except for the side effects."
Surgeon: "What sort of side effects?"
Patient: "Well, every time I urinate my eyes water; whenever my wife gives me a blow job, she gets heartburn; and every time I pass a hamburger stand I get an erection."