Who doesn't love pigs? A certain element of humor is connected with the roly-poly oinkers, and you can't help smiling when you see them depicted in art (at least I can't).
PIGGY by Susan Van Sant
Pig Family Portrait by Dale Ziemianski
Medieval Pig Slaughter by Unknown
South Korean sculpture, photo credited to Jinho.Jung on flickr
The Piggy Bank by mtungate
The Talented Dancing Pigs Wood Silhouette by mountainbrook