TOKYO – In a long-awaited fusionbetween hot-blooded hormones andcold-headed engineering, a Japanese lingeriecompany has produced a bra theyclaim will only unlock when the wearer isreally in love.The “True Love Tester” uses sensors anda special gadget linked to a mobile deviceto analyse the pattern and speed of theuser’s heart beat in the heat of themoment. If the app determines thewoman’s feelings are for real, the clasp atthe front pops open to allow mattersbetween lovers to take their course.The bra is a gimmick by lingerie brandRavijour, which says it is not for sale, butforms part of a publicity campaign forthe marque’s 10th anniversary.”We wanted to do something that wouldn’tjust appeal to people who wear ourproducts, but also to lift the romanticmood between men and women,”spokeswoman Yuka Tamura said.In a promotional video, viewers areshown how the glittering gold lame braconceals sensors placed inside the cup,which send wireless signals to a smartphone.