You either have chemistry or you don't, and you better have it, or it's like kissing some relative. But chemistry, listen to me, you got to be careful. Chemistry is like those perfume ads, the ones that look so interesting and mysterious but you don't even know at first what they're even selling. Or those menu's without the prices. Mystery and intrigue are gonna cost you. Great looking might mean something very expensive, and I don't mean money. What I'm saying is, chemistry is a place to start, not an end point.
—Deb Caletti in The Secret Life of Prince Charming