When is a compulsion not OCD?
Not a serious problem compared to so many posted here.
When I leave my house, after I've locked the door and taken a few steps, 9 times out of ten I have to go back inside for some reason. For example, I forgot to take a letter I was going to mail. Once in a while, when I'm about to go back in, I don't, just because it irritates me that I have this habit. But I'll only do this if it's not important, like with the example of the letter. But usually it's more important, like a grocery list when my only reason for going out is to go shopping.
To an objective observer (fortunately, I don't think anyone in my neighborhood bothers to keep track of me) it would seem like I'm OCD. But I don't feel any anxiety, no compelling need to go back in the house, just a practical need. It's not a forgetfulness problem, I'm forgetful like a lot of people else but not in any way that's a problem.