Woody Allen tells a joke in Annie Hall:

You know, this guy goes to his psychiatrist and says, “Doc, my brother’s crazy. He thinks he’s a chicken.” And the doctor says, “Well why don’t you turn him in?” The guy says, “I would, but I need the eggs.” Well, I guess that’s pretty much now how I feel about relationships– you know, they’re totally irrational and crazy and absurd, but, I guess we keep going through it because most of us need the eggs.