You as the person are attached to the ground by the force of gravity and therefore your perspective of objects not on your level of eye site will always be at a view of looking u. However, with the moon, it can be slightly different as it is smaller than the earth you could travel to a part of the moon where the earth is in a view from eye level so you wouldn't in fact be looking up by virtue of bending your neck.
Its weird to think the defining factor in this argument would be your neck muscles tilting your head, seems a bit arrogant thinking we are the factor in relation to two things much larger, but good question from the kid, I like inquestive midns that ask questions