Not old, just stupid?

I've got this thing where I can never remember if I've just locked a door or turned something off. Strange. If I had a pound for every time I've walked back to my front door to check I've locked it... well I'd be a rich man. Not crazy rich, but I could probably afford to get a front door that locks itself automatically.

It's the same with my car. Get out, lock door, walk five steps away, turn back and check I locked the door. Sometimes I even check I've put the handbrake on too. Which I always have done because, well, why wouldn't you?!

I also check my pockets about five times before I leave somewhere. "Hmm, phone, wallet, keys... good..... now, have I got my phone...?"

Some people say it's because I'm getting old. I'm 28. In the grand scheme of things that's not really very old. I think a cat lived longer than that once.

Therefore, I can only assume I'm an idiot. Now please excuse me while I go check I turned the oven off.