You see a face in a pattern on your carpet.
Pareidolia is influenced by silly paintings like a flea or a bit of dust.
Websites artworks actually believed they were part of something more interesting than graphic design visitors see, art websites don't attempt to store immense amounts of unstructured information. However, making art is not always a managed process, tending to be messy, unpredictable and spontaneous.
Awesome artworks are invisible pictures to make you smile. Never jump to conclusions without checking, perception is not everything. Just see what you want to see, things other than flowers in the wallpaper.