On May 6, 1840, the first postage stamp was released as a means of paying for postage services. Some feel the new cost "killed" romance for some poor people who could no longer send messages to one another for free (or a smaller fee) just through people passing through town. But overall the government tried to make stamps affordable for most people so romantic coorespondences continued-- so why don't you use a stamp today and write a love letter to your special someone? I bet it will not only surprise them-- it will make them remember why they choose you to be with in the first place!
(Go here to learn more about the history of the postage stamp.)