The BBC on takes VD with an in depth analysis of "The Science of Love:"

Scientists find out that love is a well-worn t-shirt, or we pick out potential partners who approximately smell like our parents. Couples (and even friends) also master the art of "mirroring." They begin to share the same gestures, voice tones, the way they stand or sit. Love can also make you mad, sad, or ultimately horny. There's even a match-making game.