One of the most interesting things about the new iPhone 5 is that you can use fingerprint authentication. What most people don’t know is that it isn’t just limited to your fingerprint. It also works with your nose, toes and nipples.

The only real downside is that unlocking your phone in public could be a bit embarrassing. As you can see in the video below, just pressing the phone gently against your nipple quickly opens it right up for you.

I wonder if it still works when it’s cold out?

Here’s a video demonstration:

Source: Rocketnews