I'm tall. I have been asked innumerable times to help a stranger get something off a high shelf in a store. I've even offered to help once or twice, though I only do so in dire circumstances. Usually it's something right there, but occasionally I've been summoned from another aisle. This is the code of the tall person. I am bound to help you by my giant blood, in payment of some long-past debt of my people to yours. Don't worry. The pact will always be honored.