i'm a functioning OCD person. i cannot close a car door unless i feel my keys. i grasp them in my hand just hard enough to get them to poke into my palm..no pain, just a poking sensation. once confirmed..SLAM!
if i did it till it hurt..that would be weird.
if i have to leave keys in the car, i am uncomfortable unless i leave a window down. (like at a gas station)..and none of my cars have auto lock.
i never lock my keys in the car..ever. been like this for years.