Excerpt from this article:
Two years in, Mike Mancini and his girlfriend agreed it was time to take their relationship to the next level. The couple had just moved to a new city, and it was only natural that they solidified their partnership and made a lasting commitment to each other.
They opened their iPhones and turned on location sharing — indefinitely.
“It’s not about trust or making sure that we’re not cheating or anything,” he says. “It’s more of a useful thing for times where we’re meeting up and I want to see how close she is to the destination, or checking to see if she’s still at work without asking her. One time I even helped her get her phone back when she left it on the train, because I could see its location still.”