Some choice quotes:
"...humans (another species in the 3% of allegedly monogamous mammals)"
"So the brains of people deeply in love do not look like those of people experiencing strong emotions, but instead like those of people snorting coke."
"That raises the question of whether it is possible to treat this romantic state clinically, as can be done with OCD. The parents of any love-besotted teenager might want to know the answer to that."