My "willpower, delayed gratification, and discipline" leave something to be desired. I'm not super healthy, I don't eat great. I'm not fat, though. I don't fore

My "willpower, delayed gratification, and discipline" leave something to be desired. I'm not super healthy, I don't eat great. I'm not fat, though. I don't forego food when I'm hungry and I don't exert much control over what I put in my face. But somehow, I don't put too much in. I think some people just have their internal "hunger" thermostat set wrong- whether it's hormonal or psychological or whatever. Other people have it set more correctly so by and large, "willpower" doesn't come into it. I don't need willpower to stop myself overconsuming water, but if I was thirsty literally all the time, I'd drink gallons.