SexFit: Penis Odometer!
Never fear: UK sex-toy company Bondara is developing the SexFit, a cockring that not only vibrates during sex like an average run-of-the-mill cockring, but also has sensors to analyze movement like a FitBit.
Guys, was it two or three thrusts before you came? Who remembers! Your SexFit will, updating the online app so you can share with your friends and compare data. OK, maybe it's not as productive as a FitBit, but it will analyze your thrusting technique and alter its vibrations to sync, which might actually be useful.
Plus, I'm hoping it's Bluetooth compatible, so I can set it as my 'silent ringer'. brmmmmmmmmm "Excuse me, I need to take a call."
Sadly, it's still in development and not available to the public.