Gaining

I find accidental weight gain really hot. It's like they're becoming fatties just by being their natural selves.

I'm also really turned on by the idea of getting fat because of family. I think this is because my family is pretty anti-fat. Imagine having a family who teases you for being skinny. Every time you go to Thanksgiving or Christmas they ask, "when are you going to put some meat on those bones?" and keep giving you extra servings to make sure you walk out of there a pants size larger.

This!

The hottest is when a lady that has always struggled with maintaining her weight let's go because her lover wants her to gain.

She's submitting to her desires and her lover.

What is the hottest cause for someone who's been maintaining weight, to suddenly start gaining?

When they love being fat as much as I like fat.