Apparently the song "Love Potion #9" was not a silly diddy, but simply a scientific hypothesis a few decades ahead of its time. Some scientists have now introduced an actual theory of love, based on a hormone oxytocin - more or less, "the love hormone." Oxytocin produces many of the effects similar to nicotine and cocaine, or what I feel as that happy, yet obsessive, nervous feeling in your stomach when you can't stop thinking about someone you like. Apparently there is a similar hormone released after sex and that gives you the urge to "nest" (I am speculating this is what makes us a little crazy the day after, even if we're really not that interested in a guy).
The good news is with the discovery of the power of the "love hormone" oxytocin, an anti-love drug may be in the works! Want to get over that ex for good? This could be your ticket. Its like "Eternal Sunshine of the Spotless Mind," but with much less serious side effects.