Never get married in the morning, because you never know who you'll meet that night.

Framed as a punchline, the remark plays on the idea that commitment made too quickly can be undermined by unforeseen temptation or opportunity. “In the morning” suggests haste, optimism, or social pressure, while “that night” evokes the unpredictability of desire and the social world. The humor depends on a cynical, worldly assumption: people’s intentions are less stable than they believe, and circumstances can change within hours. Read more broadly, it cautions against irreversible decisions made without time, reflection, or knowledge of what (or whom) the near future may bring—though it does so through a deliberately roguish, flirtatious persona rather than moral instruction.