If you use Facebook regularly, you may have seen pages that post the same picture of a celebrity every single day.
Some of them are, naturally, based around incredibly important pictures of celebrities. For instance, this picture of The Rock should be seen by everyone on Earth at least once a day.
When people don't see the picture they expect every day, they sometimes become concerned.
This then found a home on other areas on the internet, including Facebook and Instagram.
Recently, The Daily Dot interviewed Aron Littleton, the man behind the original, where he explained his reasoning for starting the blog, which he is still running manually after almost five years.
I wanted people to laugh, but I also wanted to create something that's unchangeable online, because it's something that people can count on. If you need to count on something, you can count on the same picture of Dave Coulier every day.
Some of these pages have broken out into more mainstream publications: Death And Taxes called the Glenn Danzig version the best Facebook page in the World.
Meanwhile, an academic paperEveryday the Same Picture: Popularity and Content Diversity, was written about this Italian page for the singer Tuto Cutugno.
That page, in turn, received its own parodies, such as this one that only posts photoshops of the original picture.
So while it's not clear why people love these pages, it's definitely clear that people really, really love that they exist.