Hank and Kara in “Unfinished Business”

Hank

On Earth, it's customary to send messages on Valentine's Day. We had a similar custom on Mars.

Kara

Well, it's too bad you can't call her (M'gann).

Hank

We Martians are a psychic people. All our communication was through thought. But when we had something really important to say, we would often write it down. On some planets, to write something down is to truly say it.