General

feeder
feedee
stuffing her
her stuffing me
forced feeding her
her forced feeding me

- almost uncontrollable appetite
- gaining weight, not necessarily deliberately, but at least accepting it without much regret.
- very long hair

Feedism, either me as feedee and lover as feeder or mutual gaining

Tight clothes, especially popping buttons/bursting seams

Being dominant but not causing pain; basically ordering my sub around and having them serve me

Being fed by hand

Squashing

Size difference with me as the bigger one

Belly rubs, especially after a huge meal

Gaining
Size difference
Age difference
Mutual gaining
Public humiliation due to size
Sex in public place
Sex in church
Being dominated
Getting stuck
Wearing women's underwear
Being tied up and force fed
Force feeding another
Anything that feels bad or prohibited as part of sex foreplay

To all this I add "stretch marks"

T h i g h s

Ssbbw
Women in diapers
Inflation
Feederism (me being a feeder)
Feet
Pig play
Transformation

crevasses. fat people are a surrealist fractal vagina

completely enveloping myself in folds

suffocating in folds

body swap stories

smells, slob

Me and the gf like
Gaining
Fat jiggly bellys
Gluttony
Get fat fast seeing how much she can gain in a week
Furries and fat furs
Pregnancy, like no protection and risking pregnancy even tho she can't get preg
Fucking while eating eg pizza, jar off mayo or Nutella
Collar and leashs

Being feed for the purpose of getting fat for the other person’s pleasure. Being told, I know you’re stuffed but eat some more so you can get fat for me. (Instant gush!)

Being called fat, but told I’m not fat enough.

Forced lactation/milking

Belly button fucking

Being made to wear clothes that are revealing or too small.

Pig play, being a pet

Forced orgasm

Cum play

Nipple and pussy pumping

Pussy stretching

Affectionate cruelty

Humiliation

So many things...