“To be playful is not to be trivial or frivolous, or to act as though nothing of consequence will happen. On the contrary, when we are playful with each other we relate as free persons, and the relationship is open to surprise: *everything* that happens is of consequence, for seriousness is a dread of the unpredictable outcome of open possibility. To be serious is to press for a specified conclusion. To be playful is to allow for possibility whatever the cost to oneself.”