Today, I had a blind date with a boy. He read my palm. What does this mean?

What do you think of the accuracy of what you said? If he is tall, it means that he knows something or is very proficient. He wants to see who you are, whether you are suitable for each other, and so on. He wants to know information about you, information that can be expressed in his palm and that he can understand. If he just said something ambiguous or irrelevant or even nonsense, then he just wanted to befriend you and find a topic to talk about.