Munchies:
Being gluttonous is all about eating in excess. Whether it's eating a lot in a sitting or eating smaller meals throughout the day, it's still gluttony. I've met feedees and gainers in this community who cannot stand being overly full but are still pretty gluttonous. So being a glutton isn't the same thing as having a big appetite.
Anywho ~
I'm an ex-gainer who's always had periods of low/no appetite. It certainly slows down the gain and can be very demoralizing. However, it gives you a chance to get used to the weight and stop whenever you want. You also get to keep your clothes and other things for longer.
GrowingLoveHandles:
I think this topic is well worth exploring. I want to write a lot about this, but I need to get my thoughts together on this. There is so much emphasis on bodies, but gluttony and appetite and fullness are definitely part of the kink for me.
There are many stories here which extoll the pleasures of this kind of gluttony, over-fullness, voracious appetites, etc.
I would look to the stories by Shores. She does a lot to explain what this is about, and how it fits into kink from the feeder point of view.
I’ll try write about it from the feedee or gainer pov later.
Your poster child feedee (someone who loves being stuffed to gain weight) is technically several fetishes in an overcoat trying to sneak into an R-rated movie.
A feedee is, strictly speaking, someone who gets off on being fed. They may not have a fat fetish or enjoy being stuffed.
A stuffer gets off on being stuffed with food. This is similar to a bloater who gets off on being filled with liquid or an inflationist who gets off on being filled with air or liquid. They may or may not get off on being fed/filled by someone else or have a fat fetish.
A gainer gets off on getting fatter, but may not enjoy being stuffed or being fed.
A fat fetishist gets off on fat. However, not all of them want to get fatter or stuffed.
There may be more fetishes, but that's all that I can think of right now. My point, however, is that with all these things, there are numerous ways to practice feedism. And none of them are wrong.