There used to be a joke about turning lead into gold in the old days. A farmerโs son went to the city to study and when he returned home from term break he had to endure the scathing comments of the neighbors (stealing godโs time and his fatherโs money). So one neighbor finally asked what he was studying, to which the reply was alchemy. The neighbor wanted to know what that was. I can teach you how to turn lead into gold. After which the neighbor got very excited and wanted to know how to do so. You just have to take as much lead as you want gold, add five yolks per kg of lead and stir till it turns to gold. There is one rule you need to obey - youโre not allowed to think of a crocodile during the whole time - otherwise it will not work. Later that night you see the farmer stirring, cursing, โI have never thought of a crocodile my whole life and now itโs constantly popping into my mind!โ ๐