OK, I am a large pilot!
In fact a recent medical had me officially in the "large boned" classification and I had to take an official "obese pilot" flight check with our company examiner. No, this is true (ask tbc) and there is a form from the CAA which has to be completed. The official reason is to ensure that the pilot's size does not interfere with his/her ability to operate the controls or emergency equipment!
Cue one p****d off company examiner who realised that half the pilots he had to check every 6 months were probably now due
another check because they were close to the line on height/weight.
I haven't got any smaller but I now fly bigger helicopters!
I can also remember the trouble we sometimes had loading patients into the Bolkow who were fellow salad dodgers. Quite a few ended up with their stomachs dragging along the top of the loading bay!