I … Wha … Sure, of COURSE someone’s tried this.
From Kotaku: Lock your new iPhone with your nipples!
Apple’s new scanning security tech is pretty clever. It’s not only smart enough to identify different fingers, but supposedly also clever to i.d. different nipples. Welcome to the future!
According to Japanese site Rocket News, the new iPhones can recognize your nipples (um, okay!), keeping it locked for different nipples.
And there’s a video. *sigh*