I mean, I guess it depends on where he's keeping his phone while nude. He might enjoy a little nude pickpocketing, if he's open minded, and the pickpocket has sufficient lube
This is why I keep my front door key in my foreskin. Either I evade the pickpocket, or I make a new friend. I cannot lose.
As a younger man, I was able to unlock the door hands-free. These days, I need to fish the key out of my floppy beige KKK hood like a sock trapped in a duvet cover on laundry day.
I keep my keys in my prison pocket. Along with my phone. And my wallet. And my EDC pocket knife. And a Leatherman. And a Moleskin and a couple of pens. And a tactical flashlight. And a small first aid kit.