Holy matrimony. The bonding of two individuals (through a legally enforced framework) based on a mutual love (of tax breaks) and affection (for better benefits).

When two people take a vow to love and cherish one another through sickness and health, for better or worse, until death (or mid-life crises) do they part, something of a universal pattern begins to take shape. Things that any married couple or child of a married couple can relate to. And what better representative of universal norms is there than a solid meme?