Why you can never go back. Once you're a feedee, you always will be. If you have given in to gluttony once, you'll keep doing so forever.
1. You're fucking up your brain. With every stuffing and every orgasm after and/or while fantasizing about how fat you'll get, you slightly alter your brain to be more obsessed with gaining. Once connections in your brain are made, once a habit is formed, it will stay there forever. You can't un-learn it, it's your new default now. Especially with habits, a simple trigger such as feeling hungry or seeing food can be enough to make you gorge. It are those habits that will be the main drive behind your rapid weight gain.
2. Your fat cells keep multiplying. While they multiply as you gain weight, they're not broken down again as you lose weight (if you'd even manage or want to do so). This means that the more fat cells your body has, the higher the statistical likelihood that glucose will end up in them, making you gain weight back, or making you even fatter. This is the main driver behind the jojo effect.
3. Social changes. The fatter you get, the more you become involved in this community. Here, everybody wants you to get fatter. You keep exposing yourself to people like me who are set out to absolutely ruin your wasteline and make you pack on as much weight as possible. It's obvious that you'll cave eventually and spiral out of control even more. You'll also feel less and less guilty for getting this fat in the first place as you're constantly being praised for it.
4. No options for exercise. When you're 10 pounds overweight, it's somewhat easy to lose 5 pounds. You'll still be able to go to the gym, go for long walks, or get some exercise in other ways to burn off a few calories. But what if you're 50 pounds overweight? Everything is more difficult then, which makes losing weight more difficult as well. What about 100 pounds, or even 200 pounds? The fat will limit your options for exercise. Eventually, the best you can do is go for a short walk around the block, which would burn approx. 50 calories at best, or about ⅓ of a chocolate chip cookie.
5. An environment designed to fatten you. Once you're down deep enough, you'll have an environment designed to fatten you. It'll keep you entertained with mind numbing and worthless content, will trigger and encourage you to eat, will keep you horny and cumming a lot and it'll simply feel too good to give up. By this point, you'll have fetishized ruining yourself with fat.
Isn't that all you've ever wanted? Given how turned on you are now I'd take that as a yes. You know you'd love it so much if this all happened to you. You'd feel so ashamed to just let yourself go like that, but nothing could compare to the feeling of bliss you'd experience when feeling all those rolls of fat on your body.
It's time to grab yourself a snack, piggy ~