The Japanese lingerie manufacturer Ravijour has a new product out they call the True Love Tester bra. You can watch the video linked off the Popular Science article for their presentation of how it works, but the truly interesting detail is the graph of heart rate responses to varying stimuli - and how a company looking to market a new product uses our data.

If I understand this correctly, the bra senses the wearer's heart rate and when it "exceeds a certain value, the bra hook is unlocked automatically." A situation where a biological response can act as a trigger may be a bit part of our wearable future, but is it something we can trust or simply a gizmo to play with?

While the novelty isn't world-changing, it is an example of how our biodata can be used in different ways and how wearables can impact the world around us using our biology as a key.