Chocolate is so many people's first love: it's sweet and creamy, but has incredible depth of flavor and a taste that lingers long after you've finished your course.
People whose staple treat is bittersweet or dark chocolate tend to prefer their sweets with an astringent kick, which makes Diptyque Do Son ($88) an excellent olfactory match. It's got the acidic bitterness of orange leaves blended with the softer bitterness of tuberose and then rounded out with musk to keep it from getting overly harsh.
Does your mouth water at the mere mention of chocolate oranges? Don't try Lush Yuzu & Cocoa ($6) unless you want to get addicted, then. It's a bright, almost tropical fragrance made with real cocoa absolute, grapefruit oil, and tonka beans, and it smells exactly like it sounds. Also dangerous because you might be tempted to actually drink the stuff. (Don't.)