feeder to feedee?

(M18) I have always loved fat girls, even very fat ones to the point of almost immobility, but only in fantasies since I wouldn't want my partner to have serious health problems. Anyway, I've always been a "feeder" or whatever, and I've always hated the idea of gaining weight myself.

But lately I'm starting to like the idea of being fat or even obese, but I still find fat male bodies aesthetically ugly, so I would never want to gain weight.

The fact remains that before I didn't even like the idea of being fat while now I do and I don't know exactly why, so I would be very happy to hear your opinions/stories about it. I would also like to know what I should do in this case.

sorry for my english but it's not my first language