Narayan and his close male friends are all around the same age. They’re all elite guys working in tech and finance — and all either dating to marry, or already married. In what amounts to an informal 21st-century marriage brokerage, they and the wives of already-married members of their friend group collude to track down potential partners. But they’re picky — and Narayan is blunt about the criteria. It’s not just about being educated, ambitious or pretty. ‘Guys who say they don’t care about their wife’s sexual history are straight-up lying,’ he tells me. All the men in his group, he says, would strongly prefer their future wives to be virgins on marriage. Some categorically rule out women who aren’t: ‘No hymen, no diamond’.