Exchange

When I don't speak, it does not always mean my listening is available for you.

When I listen to you, I assume you will take only as much of my attention as I give. You ask for more.

When I give you object X, I assume you will not also demand objects Y and Z.

Perhaps we should have made these rules of exchange clearer. Perhaps I should have named a higher price. Not because I think my attention is particularly priceless or in great demand. Only because I now struggle to regain what I gave thoughtlessly, assuming there was more where it came from.