I have currently exactly 20.0 BMI (1-3kg under what I consider my optimal weight), I don't really think I'm less hungry, more like I have better self control, o

I have currently exactly 20.0 BMI (1-3kg under what I consider my optimal weight), I don't really think I'm less hungry, more like I have better self control, obviously if I ate everything I like all the time I could easily gain 10 or more kg (I'm right now 11 kg away from my record weight), but my approach is when I reach certain weight I start limiting my intake to not go over and stay on my optimal target range. Also you can get used to feel hunger, I think most of the people in developed countries eat so much and so often they don't even experience feeling of hunger. Plus if you get used to smaller portions it's also easier to fill your shrunk stomach with smaller portions, it's about what your body is used to, it's all about self control. When I started to travel around Asia I weighted 88kg (my max), after year of traveling, lot of walking/hiking when I found new job in China I had 68kg when I liked like skeleton from concentration camp, now I am on my optimal weight exactly in middle between.