I had a seemingly autistic guy named Skeeter (or Scooter or something) sit next to me at In-N-Out once, chat me up for a bit about how much better manga is than anime, tell me how he used to be shy just like me, and then departed with a tip on my posture telling me how I was going to have lordosis if I continued sitting the way I did. I must say, his direct approach was effective and my mom compliments my straight posture all the time now. If only the dude in the op's picture had someone that cared about him. :'(