Have you ever seen a sadder looking bathtub? What exactly would a bathtub have to be sad about anyway? Seeing faces, or other recognizable images, in inanimate objects is a phenomenon known as pareidolia. Two additional examples of this are the Apache Head in the Rocks and the Elephant on Mars.
I originally came across this image while visiting the Deceptology blog which is one of the handful of sites that I visit regularly. This blog is updated frequently and features topics related to deceptions, pranks, magic, hoaxes, and optical illusions.