Tentacles:
How different is your lifestyle to that of your feedee/feeder. Can difference in lifestyle between feeder and feedee be just as sexy as the weight gain/body contrast element?
Initially, my partner and I had very different lifestyles. I was the active one that ate healthily, and he was not. I was more of a homebody that liked to go out exploring, and he liked to hang out with friends.
I found it all more amusing than necessarily sexy.
Now our lifestyles are more similar. I get out more, and he is being more active.