I call the wife "dear" because of a very real fear of calling her by the wrong name. Caught myself on several occasions with the name of an old girlfriend half out.
Several different girlfriend's names.
I was almost 30 before I got married, so there is a fairly long series of names to go through before I hit on the right one.
Been married almost 36 years. Just sticking with "dear" since drifting into geezerville has probably saved me from getting whacked with the proverbial frying pan.