If you haven’t explored the internet much in the last five years or so, you might not be aware of the rise in “oddly satisfying” pictures and videos. These include a huge variety of subjects from home decor to cooking to art and more. There’s even a substantial niche for people who enjoy melting things and watching them mix.

Some people joke that they’re indulging in their “OCD tendencies.” But the true obsessive-compulsive disorder is rarer than that. It also doesn’t usually manifest as a love for organization or neatness — despite the stereotype. We all experience that to a degree. For most of us, it’s just the natural human desire for order.

So, it’s no wonder we now have entire YouTube channels, Facebook pages, subreddits, and Instagram feeds dedicated to sharing “satisfying” videos and photos.

People differ in what they consider as “satisfying.” For some of us, it’s intricately organized things, perhaps by color. For others, it’s watching a perfect paint job or seeing one object that fits seamlessly into another. Sometimes, we can’t even express why we find something so appealing. That’s why we call them oddly satisfying.