When is the last time you looked someone in the eye and help that eye contact? Not talking about the weather or work, just simple looking at them? (Not being creepy of course)
You probably haven't in a while, have you?
There have been many studies done about the effect of unbroken eye contact and trust, or even love. Most studies will tell you that more than three minutes of unbroken eye contact will leave you feeling much closer to the person you shared that time with before.
This video takes couples anywhere from complete strangers to people married for 55 years to see how this changes their view of each other.