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Your bed could be watching you.

OK, so not with a camera.

But if you have any of a variety of “smart beds,” mattress pads or sleep apps, it knows when you go to sleep. It knows when you toss and turn. It may even be able to tell when you’re having sex.

Sleep Number, one company that makes beds that can track heart rate, respiration and movement, said it collects more than 8 billion biometric data points every night, gathered each second and sent via an app through the internet to the company’s servers.

“This gives us the intelligence to be able to continue to feed our algorithms,”

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