It is as if eyes want to meet you in the street.  Eyes know when another set of eyes are pondering upon them.  It is not a thought process, it is a feeling, a burning intuition that every person has. It’s not a girl thing, or a cultural thing, it’s a human thing.  It is a chemistry thing.  This pull has nothing to do with the thought process, it is a strong innate reaction.

Have you ever tried staring at a person and have them not look up immediately?  Unless they are very focused, in which it might take a full minute for them to realize, normally you are not even trying to look at a person before their lids up open and those irises are pointed directly into yours.

For example, you are on the train and you are trying to glance out the window, but you happen to notice anything, just anything, about the line of people directly across from you.  Just about every damn time, they look back at you for that one instance.  They know that you are not looking at them in particular, but if the gaze goes in that direction, the other set of eye balls answer right back.

There are magnets in the irises, a deep gravity in that mysterious white background of the diamond iris lens that pulls other eye balls into your depth of vision.