Hilarious Punchline

Moshe Goldsmith, an 85 years old man heard from his doctor he needed an sample of his sperm as a part of a physical research. The doctor gave him a little bottle and said: "Take this bottle home and bring it back tomorrow with an sample of your sperm" The next day the 85 years old man came back and gave the bottle to the doctor. The bottle was as clean and empty as the day before. The doctor asked what had happened and the man explained: "Well, doctor, first I tried it with my right hand but nothing, then with my left hand, but in vain. Then I asked my wife to help, she tried it with her right hand, then with her left hand, and still in vain. She tried it with her mouth, first with her teeth in it, then without het teeth, again nothing happened. We've even called Arlene, our neighbour woman and she also tried it, first with her both hands, she used one of hert armpits and even clamped between her knees, and again nothing!” The doctor was terribly shocked! "You asked it to your neighbour woman?" The old man replied: "Yes, nobody was able to open the bottle."