Lets think of the expansion of a balloon analogy of expansion. If we had two specs on the balloon (they have no forces acting on them), they would move farther apart as the balloon expands.

But instead of two specs, if we had two strong magnets that are stuck together on the balloon, the expansion of the balloon wouldnt drive them apart, the balloon would simply expand through them. If the magnets were sufficiently weak, I imagine it would be possible that they still move apart from one another albeit at a slower pace due to the magnetic attraction. In this picture, the magnetic force would be opposing the friction of the balloon.

Is there an analog of this kind of "friction" in the expansion of space? Does expansion of space have the ability to "drag" objects along with it. It seems like the expansion of space must have some king of "drag" that is insignificant compared to intragalactic forces but significant compared to intergalactic forces.