Wicked witty and well-made, Tanja Puustelli's Milking The Cow is:

"a screen printed video work featuring a pornographic loop of a fellatio scene, accompanied with the sound of a cow being milked into a metal bucket in sync with the movement of the image. The material for the loop is extracted from a 1972 classic pornographic film Deep Throat, and it features Linda Lovelace performing the title fellatio scene."

You can watch it here.

(Thanks to Andr for pointing me to directors lounge television)