Many [human] instincts apply to our tendency toward seeing faces in things with whose creation we had little or nothing to do - pareidolia. We see faces in woodgrain, water stains, toast. You name it. Of course we're inclined toward this for a variety of reasons, but what interests me about it are a few possibilities outside the realm of anything logical:
Maybe we're more inclined to pareidolia when we're lonely, or feel great need of some kind.
What if, instead of seeing faces because of a need, we're seeing them because we in some way recognize an object in front of us in some personal way?
What if pareidolia leads to a relationship, the way the supposed recognition involved in "love at first sight" can?