An elderly man went to the doctor and wanted a sperm check. The doctor said it wouldn't be necessary but the man insisted. So the doctor gave the man a jar and told him to come back the next day. The next day the old man came back, the jar empty.
"What happened?" the doctor asked.
"Well," the old man said, "I tried with my left hand, I tried with my right hand, my wife tried with her left hand, she tried with her right hand, and she tried with her teeth in and her teeth out. No matter how hard we tried,