How Two Characters Met

How two characters (PCs and/or NPCs) met or know each other

You lived together for a short while and shared life stories
You grew up together as best friends in a Lady's palace
Last month you lived together and got into an argument
You were prisoners together for a short while and got into a large brawl
A few months ago one of you was the centre of a coming of age ceremony where you got drunk together
You grew up together as good friends in a large fortress
A couple of months ago you met on a ship and met some strange characters
You were both linked by a prophet in a prophecy
You both travelled on a caravan which was robbed by monsters
One memorable night you dressed up as beggars and decided to form an adventuring group one day