My brain. I have a pair of pliers. They are great pliers. I love those pliers. I use them all the time. I depend on them. I can't use anything else. Only those pliers work for me.
Today I had to fix a small mounting bracket. I reached for my beloved pliers. After some fiddling and a few trips back and forth to the car, the job was finished. Only now I can't find my pliers! Not a trace of them. They can only be in two places, my car or the room where I was working on the bracket. I have searched both repeatedly. The pliers are not there. They are not in the drawer where I always put them away to prevent precisely this kind of issue. They are nowhere to be found. I have no idea where they could have gone.
This kind of thing happens to me almost on a daily basis. That is why I hate my brain.
From The Meaning of Liff by Douglas Adams
Kelling (ptcpl. vb.): The action of looking for something all over again in the places you've already looked.