I visit family in other states and I get comments like “I can’t believe you are so thin.” For context I am a healthy weight and I eat what I consider a reasonable diet. I sit and smile while I watch them drink soda and eat pure sugar and salt. I don’t care about your life choices but don’t act surprised by someone that’s a normal weight.
It’s not hard to stay skinny/lose weight while eating sugar/fast food. At one point I was doing intermittent fasting - I had 1 slice of cake a day and it was delicious. I just ate that slice and I lost weight.