Do you really know a person when you don't know who they are at night?
Night is one large span of time that seems to go on. There are no inconsistencies, it is night and then it isn't anymore. Most if us have gone through the teenage night owl phase where night is refreshing and fun and forbidden. It brings a risque sense of adventure. But true night owls are genetically pre-programmed. Most people are hummingbirds. Neither night owls nor morning larks. They fall somewhere in between.
At night, the lines are blurred between things that happen and matters that wouldn't otherwise occur during the day. Special occasions take place at night - parties, dinners, galas. The night offers a sense of freedom and lowered inhibition. But it also allows for self indulgence. Things get said that wouldn't otherwise find a listening ear in the light of day.