While doing a vasectomy, the doctor slipped and cut off one of the man's balls.
To avoid a huge malpractice suit, he decides to replace the missing ball with an onion.
Several weeks later, the patient returned for a follow up visit.
"How's your sex life?" the doctor asked.
"Pretty good," the man said, to the doctor's relief.
But then he added, "I've had some strange side effects."
"What's that that?" the doctors asked anxiously.
"Well, every time I piss my eyes water. When my wife gives me a blow job she gets heartburn. And every time I pass a hamburger stand I get a hard-on."
