Note: this has nothing to do with you, and you don't have to worry about eating radish. If anything, it is that you have had contact with him in real life. You are recorded in the subconscious by the hippocampus in his brain, and the subconscious comes out when the main consciousness is unclear at night. That's why people dream about you. The same is true for going home to sleep after watching a movie and dreaming about some scenes in the movie.