“Mobile dating went mainstream about five years ago; by 2012 it was overtaking online dating. In February, one study reported there were nearly 100 million people—perhaps 50 million on Tinder alone—using their phones as a sort of all-day, every-day, handheld singles club, where they might find a sex partner as easily as they’d find a cheap flight to Florida. ‘It’s like ordering Seamless,’ says Dan, the investment banker, referring to the online food-delivery service. ‘But you’re ordering a person.”