Respectfully Reserved

So during my recent trip to Korea, I was educated on a few things. First, I am apparently physically odd. It was commented on that I do not have a typical body shape. I am neither skinny nor big or stocky. I am thin-ish, but broad. They are just not used to seeing someone in the middle (read avg)? I learned a few things about how people interact these days as well. One being that if you are walking around alone, you are not supposed to be walking around happy and social. I was stopped on the street one day and told I should be more reserved. That it wasn't appropriate that I was walking around smiling and making eye contact with people. That I should be more respectfully reserved... and no, it was not an old lady/gentleman who said it to me...