Once, my father bought a “lottery ticket”,that to see the prize, you have to scratch the ticket with your fingers or with a coin. In the moment, I thougth that him was going to lose the money stupidly. But my father gave my the ticket and, with a coin I stcratched  and to my surprise, the ticket gave 100€. Then, my father said to me, that it was very good luck, and since then I believe little more in the luck.