So we don't yet know what we're going to find. But I think we'll find activity in the emotion and the memory centers and certainly in the thinking parts of the brain. Bartels and Zeki just conducted a similar study. They found activity in the memory centers and parts of the brain associated with sadness and depression actually became deactivated, which may contribute to the elation you feel when you fall in love. They advertise differently.
Women try to advertise, signal, with youth and beauty.
Men try to signal with resources, money, status. But both sexes play the flirting game in pretty much the same way. There seem to be four stages of the pickup. The first thing someone does is set up a territory and try to draw attention to themselves with the loud laugh, smiling, exaggerated body motions. Then, when you come within courting range, you start grooming talk, the voice is higher, and smoother, and it's best to start with compliments or questions.