IIRC, what's expanding is the distance between particles. Technically, the particles in your ears are moving farther apart, but the forces that keep your ears attached to your head then conspire to keep them in approximately the same spot. The expansion still happens, it's just that the effects get propagated to places where mass density is low, aka between stars.

Then again, I could be totally wrong about that.

I think you should not say that they are moving farther apart, but that they are getting farther apart.

The weird thing with this expanding universe is that things can get farther apart from each other without moving. Similarly, distances between objects can grow faster than the sum of the speeds of those objects.

Yes you're right, 'moving' isn't accurate there, whoops!

I have no idea how close my interpretation has been as IANAP but:

Take the balloon analogy for the expanding universe. Tape pennies all over an empty balloon. Now inflate it.

Every penny is moving away from every other penny.

Now imagine an ant walking along the balloon as you inflate it. He can get closer to a penny only if he is moving at a rate greater than the speed of expansion. Otherwise even if he's moving in the direction of a penny, it's still moving away from him.

As for your ears, maybe they're moving apart (I guess?) but the size of the universe is so immense that the inconsequential distance between your ears is not noticeable relative to larger distances, like between Earth and the next Galaxy.

OR Sure, your ears are moving apart, but so are the ends of the ruler you'd use to measure.

Or while expansion is happening on a grand scale, there really isn't anything preventing localized eddies of contraction or stability.

And that's how I sleep at night.