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

Being apart was wrong. Simply lying side by side did more for a relationship than words. A warm bed, a nest of animal intimacy. Words could be misunderstood, whereas loving companionship bred trust.

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?

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.

The basic issue about being too close is being closer than you're comfortable with. For some people, even slightly close is too much and for other people being enormously close is great.