Our findings show that the brain areas activated when someone looks at a photo of their beloved only partially overlap with the brain regions associated with sexual arousal. Sex and romantic love involve quite different brain systems.

Essentially, we activate an area. We can do this anywhere in the brain. Once an area is activated, it responds by sending signals, waves that travel through the axons (nerve fibers) to other regions of the brain. At the same time, we can record how the rest of the brain is responding.

Essentially, we activate an area, ... We can do this anywhere in the brain. Once an area is activated, it responds by sending signals, waves that travel through the axons (nerve fibers) to other regions of the brain. At the same time, we can record how the rest of the brain is responding.

The basic issue about being too close is being closer than you're comfortable with.

They aren't common, but enormously interesting. How can it be that you've been together that long and you're still intensely in love with them?

Four minutes of eye contact brings people closer to each other better than everything else.