Like I said, fucking talk to me when you're 40. I'm not saying you'll get fat, I'm just saying you'll have to work twice as hard/eat half as much to maintain.  And honestly, your fucking brain just stops functioning, and you just feel like shit if you don't eat somewhere around 2k calories a day. And honestly, shut the fuck up.  I've been doing the diet/exercise/weight maintenance thing as long as you've been alive.  You're honestly to fucking stupid and inexperienced to know what you don't know.