The eyes are the windows to the soul. When you meet someone, one of the first things you will generally do is look into their eyes. This is the quickest method by which to determine if they are trustworthy, or if this particular person is one of the unsavory sort, a person not to be trifled with.
With the risen popularity of social interactions on the interwebs, meeting new people face to face has become more of a rarity. When you meet a new person via your computer screen, the level of their trustworthiness is a bit harder to determine. Words can be exchanged, but it is still all too easy to imagine a level four creeper on the other end of that computer screen, trolling the internet for unsuspecting victims.
This is where pictures come in handy. (Still lurking is that nagging worry that the picture may not necessarily be that of the person that you are in fact talking to; if this is so, then end the conversation and block them.) Now you can see their eyes.
People love to twitter about #eyes, whether they are talking about their own ocular devices or the eyes of a beloved person or pet. Eyes are poetic. They are romantic.
They can be anything, and they connect us to each other in this world that has been overrun by technological devices. We still need and crave human contact, and deep down even the most devout tweeter knows this. So we post pictures of our eyes in an attempt to retain some level of humanity on the internet.
Particularly if the person tweeting is lucky enough to have inherited attractive eyes. Some people love looking into eyes. (This is not meant to sound creepy or overbearing; some people have an inherent attraction for mouths or artists’ long and graceful hands. A good portion of the population find their gaze automatically drawn to the eyes of others.)
Windows to the soul.