Just thought I'd tell you this kinda funny story.
My step-mom and her friend graduated college yesterday (both got Masters in Business) and so we were out at a Chinese restaurant to celebrate with some of her friends. So, the waitress is taking orders for drinks, and when she gets to me, she says ma'am, then looks at me and says "Oh, sorry sir! It's just your long hair." (I have hair that goes to the base of my neck) I was so happy, but kinda embarrassed because my dad and step-mom were sitting right next to me.
They mentioned it afterwards in a joking way, and I said how cool it was. It was kinda funny, though.