I was always a very skinny child right up until age 7 or 8 when I quickly got fat, almost overnight. Same thing happened to my brother and sister to a slightly lesser extent and at slightly higher ages.

Did I suddenly lose all my willpower at age 7? Did my brother and sister suddenly decide to become gluttons and sloths as well?

We were eating the same food before and after, doing the same sorts of things. Nothing really changed except the fat.

I'm beginning to think that something happened hormonally at those ages which triggered a shift from skinny to obesity. Either induced by diet or genetics or both.

So was your weight gain sudden or slow? At what age did it happen?