Learning human behavior

I learned enough about investing by the time I was in my early 20s to take care of me the rest of my life.…But I learned a lot more about human behavior as I went through life. I did not learn that by reading a book by Ben Graham or something where I was going to learn about investments. I mean, learning about human behavior, I think, really, 90 percent of is by experience. I don’t think you find a lot of books that teach you about that.