When I was 2 years old I had a rare hip disease. The disease wasn't well understood. During the following 3 years well meaning orthopedic surgeons prescribed treatment which did more damage than good. They eventually concluded surgical intervention was necessary.
This surgery gave me 6 good years of mobility. But disturbing a joint prior to puberty set arthritis in motion in both of my hips and right knee joint. My mobility began deteriorating in my teens and accelerated as I went through my 20's.
Given my mobility challenges I took a strong interest in computer programming during my teen years.