At some point between the ages of three and six, kids are taught that "sharing is caring." It's an important lesson that can help ensure said child doesn't turn into the worst brat this planet has ever seen -- and it most likely helps keep many playground brawls at bay. But the older we get, the less that motto rings true. Especially when it comes to food.
There's an unspoken understanding that goes with sharing food, but not everyone seems to have gotten the memo. Sharing a plate of fries is fine. Going halfsies on a dessert is great. Even sharing an entire entree can work. But not with just anyone. There are some people that you'll never want to share food with because they just don't get it.
Beware of the 11 worst food-sharing offenders, and be sure to adamantly decline next time they ask if you want to split a meal.