I just got back from getting groceries, and I finally realized why I disliked the idea of a remote for locking and unlocking car doors. Or at least I did before I actually had a car with a remote. And the reason is that if you need to put in a key in the door, then you can get the passenger side door for a lady friend without too much incident. With a car remote, doing that seems contrived.
And yes guys, getting the door for the lady will earn you points.