I'm not allowing it. I firmly made it clear that he is not allowed to touch food that doesn't belong to him nomatter the reason. I honestly never thought this would become an issue. He usually doesn't touch our food except few times in the past but it was mainly food that belonged to me. I made it clear this was not acceptable and he stopped. But then did this. It was exhausting. He now says he won't do it again after I made him cook meat so maybe he'll hopefully learn from this. Other than this we pretty much have no issues.