suffering. everybody suffers in love. anyway, we also had the neutral photographs. they would look at the positive and look at the neutral and we would put all of those scans together and cancel out what they have in common. you are left with the rejected brain. >> what did you find out about the rejected brain in terms of where it lit up? these functional mris can light up like a christmas tree. >> all parts of the brain. pathways that evolved millions of years ago associated with wanting, craving, and with obsession. also, areas in the cortex associated with decision making and trying to decide what to do about this. >> you mentioned this right at the very top. does this explain why -- some people deal with bad breakups and get sad a while and get better. others just go off the deep end and stalking or it is even murder. homicide/suicide. who are the people particularly at risk for that? this is an addiction, could you say somebody with an addictive personality or gene for addiction might be susceptible?