Chemistry comes in many forms. There's the subject you take in school, love it or hate it, and there's the kind that ignites in the pit of your stomach the second your fingers brush theirs. Love is all about chemicals, didn't you know? Lust is ruled by testosterone; a cocktail of dopamine, serotonin, and norepinephrine flood your system during attraction; and attachment comes with oxytocin and vasopressin. The right hormones are all it takes to send your life spiraling off in a direction you never thought it would take—or that you always dreamed of. Will you find the right chemistry for a one night stand, a whirlwind romance that lasts until the dust settles, or are you destined for that once in a lifetime love? There's only one way to find out.