Pathological has a secondary meaning of "highly abnormal." Also, brain scans have shown activation patterns of people in love to be very similar to those with O

Pathological has a secondary meaning of "highly abnormal." Also, brain scans have shown activation patterns of people in love to be very similar to those with OCD and other mental illnesses. See this TED talk: http://www.ted.com/index.php/talks/helen_fisher_tells_us_why_we_love_cheat.html http://www.ted.com/index.php/talks/helen_fisher_tells_us_why...