In early 2014, Time.com reported, "If you're trying to decide whether he's 'the one' this high-tech bra might offer you an answer. A Japanese company called Ravijour has come up with a device called the 'True Love Tester,' a Bluetooth-enabled bra that can only be unhooked when sensors built into the bra detect true love. The sensors measure a woman's heart rate and detect the presence of a group of hormones called catecholamines, which the designers claim are only secreted when you're truly in love. The bra sends the data to a phone app, which calculates a True Love Rate; only if it's high enough can the bra be unlocked."
Hey, I don't make this stuff up, I just track it. Ever since the smart watch started creating a buzz, manufacturers have produced all kinds of “smart products” including the smart sock and smart clothes.