imagining putting a feedee on a strict "diet plan" where you actually do make them eat less... however, after every meal, you get them to drink as much water as they possibly can. you say that it's a way to make them feel less hungry. every day, they drink a little more water. it barely helps them actually feel less hungry, but what it does do is stretch their stomach. their body has trouble getting used to it. sure, they had struggles with overeating before, but they never really pushed their stomach too far when it told them to stop. despite that, your instructions were strict. no matter what, whenever they eat, they have to fill the rest of the space with water. even if it groans in protest, even if it starts to hurt, they drink. all day, their stomach audibly sloshes. and each day, they manage to drink a little more than they could last time. they hardly even notice it, but you do. after a while, they've gotten completely used to the routine. they eat a small meal, and chug down practically a gallon of water afterwards. their stomach still groans from hunger, yet it's completely stretched out with water. if they refuse to drink it, you just make them. they don't ever get to skip it. after all, it's just part of the diet plan. their stomach gets used to it eventually too. it's nowhere near as hard to accommodate the water as it was at the start... in fact, it's almost like their stomach is starting to stay permanently stretched.
after a full month of the routine, you assess their progress. when their stomach is empty, they feel even hungrier than before. they barely get satisfied from the amount of food you've been giving them, only getting to feel some semblance of fullness when they're stretched with water. maybe they even HAVE lost some weight from the smaller portions... so you give them a cheat day. you take them to an all-you-can eat restaurant and tell them they can have as much as they want. their stomach growls on the way there as they imagine all the types of food they're going to eat. you both arrive and they hastily pile a massive amount of food on their plate. this is the first time in weeks they've been able to eat anything unhealthy... and they go all out. they devour whats in front of them, and quickly go back for more. a month ago, they couldn't even imagine eating like this... but now they can hardly control themselves. your feedee doesn't want to pass up on the opportunity to stuff themselves for as long as they can while they have the chance, so you're in the buffet for a couple hours. they only stop when they're absolutely sure they can't fit any more, with their belly jutting out under their shirt. you're sure they've got at least 10 pounds of food in their gut. you smile, knowing that your plan is working. they never could have fit this much before... you're sure this is the most they've eaten in their life.
now you say that you're going to take them off the diet plan, because of all the progress they've made... but in the process of the diet, you've made it almost impossible for them to control their hunger. their stomach got so used to being stretched every day that normal meals barely satisfy them anymore. their body always wants MORE. they only feel full when they're packed with as much food as they can possibly fit into their belly. it becomes rare for them to be seen without a noticeable gut, constantly snacking in order to fill up any possible space.
you don't even have to lift a finger anymore. every day they just gorge themselves. any pounds they actually managed to lose over the past month all come back within a week. the fact that they once couldn't stretch their stomach with ease almost feels like a distant memory at this point. eventually, they even get concerned and raise the idea of a diet again... but they give in to their newfound hunger immediately. who knows how long it would take for their stomach to get back to normal at this point...
congratulations! you've just managed to permanently ruin a feedee.
