Some questions from someone who is genuinely curious and has almost zero domain knowledge (I've never commented on this topic before, I don't think):

1. It seems to me that any social stigma would be based not on being overweight per se, but rather on the visual appearance of being overweight, i.e. being "fat". However, I don't find that your visual appearance is outside the normal variation that I expect to see among people in the contemporary United States. (In fact, I never would have guessed that you had an interest in this topic if you hadn't discussed it here.) So I'm quite curious about what evidence you've seen that you're suffering a social stigma.

2. Turning back from the social to the medical: given that you seem to naturally tend toward a certain "high" weight (I presume it doesn't actually increase without bound!) to what extent have you considered the possibility that the medical establishment's definition of "overweight" is wrong, or doesn't apply to you?

3. Do you think you would be experiencing the same phenomenon if you were living in the ancestral environment? Why or why not?

4. Have you tried eating less (e.g. only one meal per day)? If so, what was the result? If not, what do you predict would happen to your weight?