Yeah, this is either deliberate sabotage (but it sounds like he might do this when they're alone too?), a made-up letter, or some kind of eating-related. Like, someone who doesn't have disordered eating on *some* level isn't going to *want* an entire dinner and seven slices of cake? If it's real it almost reads like descriptions I've read of things like Prader-Willi Syndrome where people truly can't exercise self-control around food.