Have you heard of the “number neighbor” trend? Basically, it’s the modern-day version of pen pals. People are texting their number neighbors (or textdoor neighbors) – people with phone numbers that are identical to theirs except for the last digit -- which is one greater or one less than theirs. The hope is to make a digital connection with a complete stranger. You can see some of these exchanges on Twitter at the hashtag #NumberNeighbor.