It takes only a second to meet someone.
A chance encounter in an elevator.
Maybe you walk up to the bar at the same time.
Or perhaps you sit down on the subway and they take the seat next to you.
Regardless of the circumstances, it only takes a second for you to notice them.
In that second you know if there is something worth holding your attention. In the second you know whether you smile or turn away.
In that second you know if you want to know more.