You don't fall in love because you fall in love; you fall in love because of the need, desperate, to fall in love. when you feel that need, you have to watch your step: like having drunk a philter, the kind that makes you fall in love with the first thing you meet. It could be a duck-billed platypus.
Umberto Eco (2007). “Foucault's Pendulum”, p.234, Houghton Mifflin Harcourt