Want to know how you rate in the sack? There's an app for that! The iPhone "passion" app gives users a rating of one to 10 based on three pieces of sexual criteria: duration (measured by the phone's timer), activity (measured by the motion sensor), and orgasm (measured by the microphone). The user just has to wear the iPhone in an armband or keep it in a pocket, which sounds sorta tricky.
While I don't think anyone needs a phone to tell them how good sex was, it could be fun to get some feedback on love making sessions. Would you use this app?