Heidi Klum named her breasts to honor her homeland of Germany. The uber-hot supermodel told UK tabloid The Sun:

“It’s been an ongoing joke for 12 years. When I began modelling I used to say ‘These are German breasts — one is called Hans and one is called Franz.’” (Source)

What a coincidence. I've also named Heidi Klum's breasts. I call one Good and the other God ... as in Good God. Naming body parts happens to be a hobby of mine. For example, I call my right fist The Justice Dispenser. The dude who gave me a weird look last week at the supermarket can certainly tell you why. When he gets out of the hospital.