I started out 155lbs. I'm currently 308.
I was always thin, but my metabolism prevented me from building any muscle, not that it was ever the goal to be muscular. I always had a thing for fat people but I never considered getting fat myself.
I met someone in a forum and he convinced me to try and I gave it a shot, quickly became hooked.
It's been a treat, going from thin, abs, etc... to soft and squishy. No regrets.
1 year