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The “True Love Tester” bra from Japanese lingerie company, Ravijoir, tracks changes in the wearer's heart rate, and when the user detects true love, it magically unclasps.

Read: How true love opened the smart bra

The smart bra differentiates between true love and normal increases in heart rate via the adrenal gland, which secretes catechlomine transmitted to the automatic nerve, thereby causing a pulse increase that differs from other types of heart rate surges.

Ravijoir's motto is “We do anything for women.” But which sex is this really designed for?

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