Sure.
You start off with a guy. He may be fat or skinny, doesn't matter. Anyways, they go on a site like FantasyFeeder and usually (unless they're a FA - fat admirer or FFA - female fat admirer (girls who like fat guys. I got links if any of you are fat and want some love)) find a skinny girl whose signed up. They get in touch, and the guy usually either cooks a shit load of food, and either force feeds the skinny girl to eat it all, or just makes her eat a shit load, so that she gets fatter as the day goes by. This turns him on, seeing someone get fatter.
The weird thing is that there's a SHITLOAD of hot feedees (the girls or guys who get fed up.) . Feeding someone doesn't turn me on, but the end product - a bbw girl - does turn me on, so I appreciate the feeders for giving me more puss.