Two Empty Chairs
I'm not a fan of Freud. I don't like his particular reductionism. But I'll give him this much -- in nearly every kitchen, including my own, there are two empty chairs at the table, one for the mother of the groom and one for the father of the bride. If the groom could fill the emotional gap left for the bride by her father, and if the bride could fill the emotional gap left for the groom by his mother, then the chairs could be withdrawn and discarded; this particular circle would be unbroken. But this almost never happens. The chairs remain, empty, as Freud's wedding and also anniversary gift to the not so perfectly happy couple.