I call it the “discount” issue.
It works like this:
Something unhappy (but not devastating) happens to you. You know that you will feel depressed about it for a certain unknown amount of time, and then one day it won’t bother you. You want a discount on the amount of time it takes to recover, because you’ve had so much practice at feeling this way already.
Or:
Something about a situation keeps setting off terrible emotional warning bells. However, you know that you are actually safe, and that the warning bells are an old defense mechanism reacting against a problem you don’t have anymore. You know your reaction is stupid, but you can’t stop doing it. You want to return the defense mechanism to the store where you got it.

Kneel to Me
Mate: And More Stories from the Erotic Edge of SF/Fantasy
Up for Grabs
Wired Hard 4
Wishbone