I go to a couple of groups. In one group someone brings an iced cake each week. I always decline and have explained once that it I have an intolerance, so they know it's not personal. The same things happens in another group, but less regularly, that someone brings in some food that I politely decline. It's not an allergy where something bad will happen if I have a piece, just a mild stomach upset, but I prefer to avoid that.
I find when I decline food in social situations (which are not about the food as their primary goal, that's just a side thing), I get the impression that I'm being offensive by not taking a piece of what is offered. Is it the polite thing to take the food in social situations? Am I being rude? I join in for the activity, the food just happens to be on offer.
My AIBU is, AIBU to decline the food on offer? Is it really socially obligatory to graciously accept food on offer?