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

We're getting closer to something we're comfortable with.

I actually thought it was closer than that. It was close enough.

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.

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