This has happened to me, so it could just be he's doing it purely out of inertia more than feederism or wanting to make anon fat, I used to date fairly chubby girls who really liked sweets and chocolates, so I'd usually buy them lots of them, now my current gf isn't as chubby and also has teeth problems and can't eat much sugary stuff, so I had to actually stop getting her something sweet every time I go out with her and instead just asking her what she wants