Where do you keep your cars extra key?

My husband seems to think he has to keep it on HIS key ring. It drives me fucking nuts. I think it should be kept in a safe place IN THE HOUSE. Incase someone loses it, you always know where the extra key is and it is available AT YOUR HOUSE. Well, my husband is at work, I can’t find my keys (they were in his car)so now I’m sitting in my driveway waiting for my husband to bring me my keys when I could’ve just grabbed my extra key if he would have listened to me and left it in fucking side.