I don't like cake. At all. Or I've cream. I'm also quite overweight.
At every family birthday dinner there's cake and ice cream afterwards.
Last night was dniece's. As usual I get given a plate and say 'no thank you' and have to do the 10 minutes of 'you're not having some of the birthday cake?!! Have some ice cream at least then!!' shock 
DH says it's weird and a bit rude. Maybe his whole family think the same and that's why there's the shock, horror and hurt every time. 
Am I being rude to decline? I could just take a piece and eat a bite but I feel like that's ruder! And wasteful.
Sorry, this is probably a contender for the most dull AIBU ever! 