Do you get jealous when your girlfriend can eat anything she wants and doesn’t gain a pound? You shouldn’t be jealous, you should be concerned about her. Just because someone is naturally skinny, that doesn’t give them license to scarf down whatever they want. Well, they can, but it could cost them. Doctors believe that even if someone is skinny, they can have fat internally that surrounds vital organs, endangering the person who looks so healthy on the outside. Here’s more on the subject.