Just saw this on Engadget:
https://www.indiegogo.com/projects/lovely-the-smart-wearable-sex-toy-for-couples#/story
I always wondered how much thrust my pelvis was creating...
https://www.indiegogo.com/projects/lovely-the-smart-wearable-sex-toy-for-couples#/story
Simply slide your penis into the hardware, get banging away and, when you're done, a mobile app will tell you your score. Statistics that are recorded by the device include the calories you've burned, the force of your thrusting and even your top speed. The software will even look at your performance and come up with one of 120 new positions that you can try next time out.
I always wondered how much thrust my pelvis was creating...