Never look a gift horse in the mouth—and never gift a look mouth in the horse. That doesn't make sense you say? Well, I feel like it makes about as much sense as the original. Horses and mouthes aside, it's never a good idea to make an issue about something someone is giving you for free. For one thing, it's free and there's nothing better than free stuff. Even if someone gives you a nest of angry bees at least you can make honey. If you're allergic to bees, at least you've gained the knowledge…