Reducing shopping cart entropy

Why do I have a penchant for returning my shopping cart to the exact spot where I got it. I know they have employees who are paid to pick up the carts in the lot and return them, but somehow I think I'm doing my part returning them. I'm reducing the entropy of the system. There are times when I spend the time to not only just return them to the starting point I return them to the main cart spot. So I've reduced the system's entropy. Neat! Now I'm wondering if somehow my little idiosyncrasy might be passed on to my offspring. Nope, I've been told that I'm just being weird. Oh, well. It's only a small thing, but I've been doing it for years. But why? Because it makes me feel better. It's something I have control over.