I always was a person with a “fast metabolism “ never could gain weight no matter how much I consumed. And believe me I tried. ( I’m in my Thirties now and finally starting gain weight ) and I remember I was a late bloomer like 14+ and slow and steady till about 25. It was rly annoying and I did have a lot of obese friends in childhood and they all hit puberty at 10-13 and fast. In high school was the worst. It def messed with my head and how insecure I was. Lol. I’m all good now but took enough time compared to others lol