In an eminently approachable work of wide cultural reach and meticulous scholarship, Pettman undertakes an unprecedented examination of how animals shape the understanding and expression of love between people. Focusing on key figures in modern philosophy, art, and literature (Nietzsche, Salomé, Rilke, Balthus, Musil, Proust), premodern texts and fairy tales (Fourier, Fournival, Ovid), and contemporary films and online phenomena (Wendy and Lucy, Her, memes), Pettman demonstrates that from pet names to spirit animals, and allegories to analogies, animals have constantly appeared in our writings and thoughts about passionate desire. By following certain charismatic animals during their passage through the love letters of philosophers, the romances of novelists, the conceits of fables, the epiphanies of poets, the paradoxes of contemporary films, and the digital menageries of the Internet, ultimately argues that in our utilization of the animal in our amorous expression, we are acknowledging that what we adore in our beloveds is not (only) their humanity, but their creatureliness.