Some of my fat/thinlogic Hello. I've been a long time lurker and here is some of my fatlogic (thinlogic?). I'm a 24 year old female and I've been thin all my life, with a BMI in range of 16.6 to 18.9 since I was 12 (same height since then). I'm 172 cm (5.65 feet) and weigh about 53/54 kg (116/119 lbs) now. I've always liked my body and I still do.  I've been called skinny and anorexic though all my teenage years even though I never had an eating disorder, I never dieted and ate what I want including a lot of chocolate and sweets. I've had a thyroid condition called hashimoto's disease (funnily enough it's "supposed" to make you gain weight) and thyroid issues run in my family. Furthermore most people in my family are thin. I've always been a very picky eater and both me and my sister ate only specific foods as children. My parents never made us eat things we didn't want but we were never hungry (we also didn't get much sweets or unhealthy foods until we were teens (not that it would matter because I hated soda as a child and to this day I hate cheeseburgers)). Anyway I'm really grateful because I still hate it when people try to make me eat things I don't like or when I'm full and I simply can't eat any more. Many people think that I don't eat much, because mostly I stop eating when I'm full and rarely overeat on normal foods but... a few years ago I developed an addiction to chips and I can really eat a tone of then in one sitting (even 300g). I know it's not healthy and I'm working on it but I've never been very good at "healthy eating" and I lead a pretty much sedentary lifestyle. I walk and even go to do some yoga or exercises once a week but I wouldn't call myself active. When I eat a lot of chips, I consider it to be my "dinner" because I'm full but it's still about 1500 calories. Even though I never eat breakfast (which is also supposed to make you fat because it's "slows your metabolism"), I'm sure I could easily exceed the daily calorie intake. How the fuck am I not fat? Seriously, I'm one of those "eat what they want/how much they want and never gain weight" people. I eat fast-food, chips, a tone of spaghetti, I eat at night, never eat breakfast, have a thyroid issue and I've been doing so for years. So how? I always believed that it was because of my genetics, fast metabolism and maybe a bit of my fussiness but I simply don't gain weight whatever and how much I eat. TLDR: I've been thin all my life. I have a thyroid issue and a few years ago I started to eat very unhealthily and a lot and I'm still thin and don't gain weight.