What are these shoe pictures I keep finding on every computer in the house???

Every computer in our household left unattended for more than 30 seconds somehow ends up with this photo on its desktop when it's woken up.

Are our computers dreaming of soccer shoes?

Pascal Almost Actual Size

Carsten Extinguishes Fire

Athena and her Pumpkin

How sweet. . .

In this picture they kinda have the same expression.  . . .or maybe I just looked at the photo too long. . .Athena's nose is straighter. . .