Fat fetishism
Fat fetishism is a paraphilia in which sexual pleasure is derived from excess fat. Tastes range from 'pleasantly plump' all the way to morbidly obese.
For male homosexuals, the categories are "chub" (or, "superchub" for men who tend to be larger than 350-400 lbs) and "chaser," the former being the subject of the fat fetish. This relates to the "bear"/"cub" subculture, and also engendered the categories of "gainer" and "encourager" (For the straight equivalent, see feederism, below). A straight male chaser is a "Fat Admirer", known better as a FA, and as follows, the female equivalent is a FFA. BBW and BHM respectively stand for Big Beautiful Woman and Big Handsome Man, and are used in both straigh- and gay-majority contexts (but one may venture to say that most people involved in or aware of this phenomenon associate these two categories with publications that are oriented toward, if not enjoyed by, a straight audience). Numerous publications, now largely online, have been devoted to this phenomenon, no matter the sexual orientation that undergirds its different permutations.
The issue of erotic weight gain has caused a collision, at least in a heterosexually-dominated realm, between the goals of fat acceptance (represented by NAAFA and others) and feederism (see Dimensions Magazine online), which some contend are not mutually exclusive interests/movements. One argument mobilized against the feeder movement falls into a pattern where sexuality is privileged over social categories that allow for the contestation of institutionalized or codified discrimination against large people, and direct criticisms usually entail the possibility that feederism contributes to a counter-productive objectification and dehumanization of the "feedee." Counter-arguments coming from feeders/feedees and sympathetic FAs is that something evident in the expressions of feederism in writing, images, videos, etc. is that the majority only partakes in this fetish in the realm of fantasy and is more than mindful of rational boundaries. Also present is a belief that the sexualization of fat is not as pernicious as their detractors claim, and if "Fat Admirer" or "Chubby-Chaser" archetypes become more visible or mainstream, fat will thus lose a major aspect of its general social and cultural stigma.