It's funny to read that some people believe that hitting pax with your butt as you walk down the aisle means you are a little on the large size.
I don't consider myself big by any stretch of the imagination, although I do have a couple of curves, yet I find that at least once a day I suffer by what we call at work "C-D Disease". That's hitting the people seated in seats C and D as you walk up and down the aisle. Even the 'stick insects' suffer from this unfortunate infliction time to time.