An 86 year old man visits his doctor for a check up. "So," says the doctor, "how are you getting on?" "Things just couldn't be better," the old man replied. "I recently married a 19 year old blonde and she is is now pregnant with twins - what do you make of that, young man? Not bad for an old codger, eh?" The doctor thought for a minute then said, "I have a friend, an older bloke like yourself. He loves shooting. Once he went out with his walking stick instead of his gun; he only realised his mistake when he arrived at a lake and saw a magnificent beaver sitting by the water's edge. He really wished he could bag that animal, so, wistfully, he raised his stick, aimed at it and said, 'bang, bang.' To his amazement 2 shots rang out, and the beaver fell over dead. What do you make of that?" "Well, logic would tell you that someone else must have put 2 shots in that beaver while your friend was playing around with his stick." The doc replied, "my point exactly."