I was wondering the same as gp. Why would anyone ever do something that risky and obviously stupid?

Then I read your comment and realized I've done this like 6 times in last year...

You know what? Based on my life experience to this point I wouldn’t do that. On a couple of occasions I’ve had an idea of where to put something (e.g. “if I put the money here it will be safe”) and my brain stop me (e.g. “are you stupid? You’ll never remember you put it here. Put it somewhere you’ll actually check if you cant remember”) and it stops me. Benefit of getting older and learning from past mistakes?

Wallet goes in right front pocket. Phone goes in left front pocket. Keys goes with wallet.

Exception: When I'm out running, if cell phones are forbidden (certain locations at certain customers), or if I wear a suit (things like weddings, funerals and when I celebrate 17th of May.)

If a pair of trousers cannot hold these items I don't buy them.

Sticking to these invariants makes for less frustration. Not sticking to them means frustration twice a month or so.