I had a friend in high school, who was athletic, had a good masculine build. Well, he became a programmer right out of high school. Didn't seem him for 10 years. By 28, his transformation was unbelievable. He was bald, fat, pear-shaped, and he looked like he was in his early 40s. If I didn't see and spoke with him in person, I would deny that this was the same guy.