A bloke goes to the doctors: "Doctor, my girlfriend is pregnant.....but I always use protection. How can that be possible?". "Allow me to answer with a little story", replied the doctor. "A man used to go hunting every weekend and never forgot his rifle. One day he grabbed an umbrella by mistake. While he was in the forest, a bear charged at him. He raised the umbrella to his shoulder and shouted bang, and the bear dropped dead". "That's ridiculous", said the bloke, "someone else must have shot it". "Exactly", replied the doctor...