My OP came from wondering about the loss of keys whilst out.
How would you get in the house to retrieve the key? Especially those without a handy husband with a door key.
Alongside the car key presumably the house key would be lost too.
I keep my spare on me in case I lose the bunch. I can access my car while sorting out getting into the house.
Forgetting where you left your keys dies not mean you are “losing it”
Harry and Meghan ‘royal’ tour of Nigeria.