I'd go so far as to assume it may be borderline inevitable given the right setup, lack of negative factors, presence of positive, etc. Our culture is so weight-obsessed, fat so taboo, it's practically begging for something like feedism to exist as a major sexuality subculture. And so, I think that many if not most people are to some degree predisposed to it, even if for 99% their life and situational circumstances will never meet in the right combination to evoke it more than in passing.
But for some, with such natural predispositions, open enough, and with a partner interested and encouraging and compassionate and passionate, etc., it makes perfect sense. I mean, it IS intensely erotic on so many levels.
For me personally, feeder-leaning, my first encounter with the genre wasn't even a person, it was a story, I think, though it was very long ago. But all the factors in my circumstances and life and personality and personal experiences are indictive of predisposition. So that when I encountered that story, a simple story, translated from german I think, of a teen having lunch with his chubby girlfriend, it made me uncomfortable but intensely curious. And I was neither manipulated toward it nor turned off from it, which I think is key for anyone in any experience, really. My curiousity and discomfort in combination led me to search out other stories and communities, and choose on my own how I felt about it.
Not quite what you were asking, but relevant I think. When people are introduced to something new, their experience often falls under one of three categories, IMO: pressured into it on one end, or so passingly as to go almost unnoticed on the other, but in the middle is just enough awareness and excitement/anxiety/fun to make an impression without being a turn off. Something expressive or alluring or mysterious, perhaps, or yah, just fun and interesting. I think there's a sweet spot for a lot of different kinds of experiences, and especially introduction to them, that makes them available for integration into your own personality and self.
IMHO, of course.
1 year