The British sex toy company Bondara is showing a prototype of a connected penis ring. Other than the usual non-connected function, the SexFit will track your activity and calorie burn (less than you might expect, actually) and upload it to your cell phone via Bluetooth. It will also vibrate in rhythm, track your pace, and even light a series of LEDs to keep you on the beat.
You also can apparently share your results with your social circle. (No word if you can lie about it.) Whether your partner would approve of that sharing is another matter.
The company hopes to begin testing by the end of the year.