A Prince Falls Down a Hole, etc...
Once upon a time a prince fell down a hole.
A princess was walking by and heard his shouts.
Naturally, the princess found a ladder nearby and lowered it into the hole.
The prince climbed out, shook the princess by the hand, and they went on their separate ways.
They saw each other from time to time in marketplaces between their two kingdoms, acknowledging the other's presence with a nod.
Later they met at a call for rescuing villagers from a nearby fire.
A witch once gave a tea for those inclined to help her with her healing work; it was there that they became friends.
Their friendship was lively and intellectual and satisfying.
A whisper grew in the kingdoms, of a marriage, of a combined land, of tiny princesses and princes.
Perhaps. And perhaps it was the witch that married them. But if it happened, it was nice that it didn't happen all at once. For them, anyway.