Well like all of the fatties' diseases, if you've got it, and you're fat, it's probably because you are fat. Thin people have heart attacks/strokes/joint problems too, but if you have a health complaint and you're a fatty, it's probably because you're a fatty. This where the ridiculous arguments about "fat shaming" doctors come from. Not everyone who gets lung cancer is a smoker, but if you're a smoker and you get lung cancer, let's face it - it's probably because you smoked.