I have two main ones, with a lot of variation. One is growing someone into a 300+lb milk cow and milking her everyday. I love the idea of making her wear cow print, and making sure she doesn't have to lift a finger so she can make more milk for me. Of course I gain at least a little weight from all the rich milk I'm drinking.
The second is one where I enter an ANR with someone(s), and I'm oblivious to the fact that they're fattening me. They're constantly giving me great orgasms and so much milk that I become addicted and don't really want to do much of anything else. I get fatter and lazier, and the cycle continues. Sometimes the person fattening me in this situation is a gentle domme who just thinks I'm much too thin and she needs to take care of me, and sometimes it's someone who I've wronged somehow, getting revenge.
2 days