"Don't get me started. Nothing makes you feel quite so alive ... so aware of your own body as a good, physical fight." The corner of his mouth curls up in a smirk. "Except, you know, sex."

Kaz draws a lazy circle in the air with an index finger. "Back to that love and hate thing. Passion, adrenaline ... it all comes from that primal part of our brains. The part we try to ignore even though it's so goddamn exciting."