This follows on my post You Are So Tiny.
I picked up body image rules from both my parents.
My dad could fit into suits he wore in his twenties. He weighed himself every day. If he gained a couple of pounds, he took action. “I am not eating butter today.” Code for “I have put on weight”.
My mother always bemoaned her pot belly and at age 60 had breast reduction surgery. When she died, I found a log in which she captured her weight. Hundreds of entries that never fluctuated more than 5 pounds one way or the other.
Family Rule: meat on your bones is bad.