Lady and the lion

the king found out that the princess is in love with an ordinary man. tomorrow the man will be placed in the arena. but the evil king will pretend to give the man a chance. on 2 rolled pieces of paper, one written princess the other lion. but instead the evil king wrote lion on both pieces. but the princess knew of this and told her lover too escape because he has no chance. but the young man told the princess not to worry because he knows a way to pick the right rolled paper. so the following day in the arena with many people watching, the man is presented with the 2 rolled pieces of paper with both written the word Lion. how did the young man was able to select the right one and not be eaten by the Lion?