Fridge-safe. Grandma-compatible. Dad jokes, puns, and wholesome absurdity. The kind of card a coworker can find on your desk without a meeting being scheduled.
Jokes that broadcast on two frequencies. Tell one in a room of six-year-olds, thirteen-year-olds, and adults: the adults will get it, the thirteen-year-olds might, and the kids will hear an entirely different — perfectly innocent — joke. Double entendre, zero vulgarity. The mail carrier will smile and say nothing.