The greatest duos of all time can exist independently of each other, but totally shouldn’t. These are combinations and famous duos whose whole value is greater than the sum of their parts. For instance, you can have cheese (and it will be glorious) and you can separately have ham (and it will be succulent), but put them together and boom: ham and cheese and delicious. These famous male and female partners in history, delicious food pairings, famous movie duos, and famous TV duos need each other like peanut butter needs jelly. You should celebrate your friendship with your best friend by giving him one half of the F.C. Barcelona Keyring & Badge Set as you both will always need each other.