Yes. It's one of my many fantasies, and branches off mainly from my underlying "being fattened/treated like an animal/object" fantasy.

There are many possibilities, but the one I really like to imagine involves a trio of small, thin women (possibly Asian) whose sole purpose is to make me as fat as possible--whether I resist or not. Their jobs include: restraining (e.g. tied to a bed), hygiene, measuring my progress, (sexual) teasing, and of course feeding or force-feeding. Over time, any willpower or control I might have had over my weight and life bends and then breaks, and I submit to them like a brainwashed animal. The trio also genuinely *enjoys* fattening me, as they take turns stuffing my face, playing with my soft, bloated, expanding body, and gossiping about me in a foreign language.

Over time, I transform into an increasingly helpless blob--which only makes them more aggressive in their efforts.
One day, the restraints come off, but by then I'm too fat to even sit up under my own power--and suddenly I'm gripped by a weird combination of panic and insatiable hunger... and I beg them to feed me.

I've gone from thin to obese--gaining about 100 lbs total from my lowest to highest adult weight. The fattening process feels pretty amazing in the long run, but it takes time, patience, and firm dedication--particularly if you're starting out at or close to a normal weight.
I feel my stomach now and it's just a huge, round, soft, squishy, jiggly blob of fat. I used to have abs! But getting fat is not without consequence...

The fatter you get, the fatter you get. You get hungrier because you need more calories just to sustain your weight. Fattening foods can become an addiction--which is part of the turn-on for me (lack of control)--but also probably not "the healthiest."
Also, when you get so fat your mobility starts to be affected, exercise becomes more difficult and more undesirable, so you do less of it--and you get fatter. The point being that after you gain a certain amount of weight, it's unlikely you'll be able to go back to your starting weight.

You can always try a "test gain" of say, 10-20 lbs, and see how you feel. If you decide to gain, just be aware that the *reality* of being obese is different from the *idea*.
I love being fat, but there are rare times when I wish I could go back to being thin--which ain't gonna happen at this point.

Feminization is a major element in my fantasy feedee world. It stems in large part from my submissive desires fulfilled at the hands of a mentally and physically dominant feeder. The feeder in this scenario is often a very muscular woman, who works out constantly when she isn't feeding (or force-feeding) me and administering my hormone replacement therapy. Day by day she grows stronger while I grow softer, fatter, and weaker, until she can easily overpower me. At that point I've essentially grown into the body of a huge woman, and am treated as such. I exist to please my feeder, and am at her mercy mentally, physically, and sexually.

My idea of a perfect Super Bowl this year ends with the Falcons crushing the Patriots, causing Tom Brady to break down, pee his pants, and scamper back to the locker room weeping hysterically in front of millions of people.

Of course, the Patriots will probably win, again, because they're supposed to.

You're still relatively young. I had the same problem when I was thin and tried gaining in my teens and 20's. Even after gorging for months, the most I gained was 15 pounds. I'm not saying this to discourage you; it's just been my experience--and according to what I've read--that metabolisms tend to start slowing when you hit 25-30 years of age.
After I turned 30 I tried gaining again, and put on 90 pounds total (I'm real short so that's a lot) over three years, with most of the weight coming in the first eighteen months.

Time, patience, and dedication are crucial. Most gainers want faster results, but ime it's better to think in terms of months than weeks.

The simple act of standing up after laying down in bed or on the couch is definitely more of a "procedure", since I now have to contend with this big, round, soft, jiggly mountain of fat at my core where my abs used to be. I also haven't really exercised in years and can't even do 1 legitimate sit-up... the struggle is real!

(Of course just thinking about this is a major turn-on and makes me want to be even fatter and lazier.)

I'm also very short, so when I try to reach a tall shelf in my kitchen, my belly bumps up against the counter and no amount of sucking it in helps to reach. (If I lived with a feeder, they could totally tease me by hiding sweets up there!)

I received my first public fat shaming earlier this year... AT MY FATHER'S FUNERAL. Apparently an acquaintance of my father felt that was an appropriate time and place to confront me, very loudly, about my weight gain. I brushed it off as best I could, but it was crazily insensitive and very hurtful.
I don't know if this guy had some vendetta against my dad that just spilled over to me, or what was going through his mind--if anything. Maybe he just never got the memo that funerals are not the most appropriate place to harass and insult the family members of the deceased..?

(I saw the movie a long time ago.)
How would I react? With horror! All my hard work reversing itself against my will? Yikes.
As gypsy curses go, I'd much prefer to be the victim of a "Fatter" curse...

^Great comment, flyinghorse.

For most of my life I was a fat person trapped in a thin person's body. I fantasized about being fat but could never seal the deal. But over the last couple years, I've managed to completely transform not only my body but my mind. In my spare time, I just laze about and eat. When I'm not eating, I'm thinking about eating. I feel hungry almost constantly--even when I'm full!

I'm totally committed now, since there's pretty much no chance of ever going back to a 'normal' weight again.