Buy This: Dark Temptation by Axe, $12

If you don't mind the risk of looking like a simp, then give her that box of chocolates on V-Day. If she likes old fashioned chivalry, then you're in luck, even more so if she eats it while you're still around. Chocolate doesn't do much when it comes to smell, but eating it enhances women's moods and does the same thing to brain chemistry as falling in love does.