Had a brief panic attack after my morning shower when I noticed my scooter key wasn’t in my pants. I had put it there when I got out of the tent, minutes before!
I forgot that I’d used it to open the pet carrier to get fresh underwear, and absentmindedly left it there. Phew!
This is why I am obsessive about always putting things in the same place when traveling. Except when I forget.
Of course you have a duplicate key–probably on your dresser at home.