We’ve all heard that parenting involves sacrifice, but this was taking things too far! I should preface my candy-coated outrage by saying that I have received (and eaten) a 2 pound bag of peanut M&Ms for Christmas for as long as I can remember. It’s my very own holiday weight-gain tradition. That all changed the year my eldest son was diagnosed with food allergies to eggs and peanuts (why not brussel sprouts or liverwurst?).   I had the benefit (read:completely horrifying) experience of seeing my son have a physical reaction to an allergen. That gut-wrenching, powerless feeling I had in the emergency room watching my pock-marked, hive-riddled 9 month old…