I know what you mean hun. it does suck though. especially when they eat it RIGHT in front of you.
When i was a kid, my brother was diagnosed with ulcerative colitis. One of his favorite snacks in the world was popcorn. He used to snack on it ALLLLLLLL the time. My father started getting bags of it, like the really bad crummy stuff that you can twist tie up (lol it always tasted so old) but he and my brother would eat it. Well when he was diagnosed, my brother couldn't eat it anymore because of the issues it was causing him- i mean like, couldn't eat it, would rip him to bits. It was the only food he loved so much that he couldn't tolerate (that we knew of at the time) and you know what, my father NEVER gave that up. He would sit there, and eat it right in front of him. and my brother would get up and leave the room. this is a 13 year old kid. Very sad.
Reminds me of him when my husband does that crap.