Things Caused/Affected By Genetics  Height Hair/Eye Color Facial Structure Skin Tone Vocal Characteristics Allergies Immune Disorders  Things NOT Caused/Affected By Genetics  Shoveling more food into your gaping maw than your body needs to function. Horking down calorie-bombs with no nutritional value. Guzzling carbonated sugar-water by the gallon. Sitting in front of the idiot-box all day instead of exercising. Doing all of the above at the same time, all day every day.  tl;dr - If you're a fat fuck, its your own damn fault you're a fat fuck. Genetics has nothing to do with it. GTFO you fat-sympathizing piece of shit. @Achtung_Shitlord, @leelem0n, @Duress56 - We've got a fat sympathizer spouting fatlogic here.