WATER IN MILK EXISTS (2008) by lawrence weiner (!) 22:52 min.
"in cooperation with the swiss institute, lawrence weiner teamed up with cinematographer kiki allgeier to realize WATER IN MILK EXISTS, a fresh skin flick that challenges both artistic and pornographic conventions. the film contains quotations from the artist's children books, austere dialogues on string theory, animations, as well as a lot of carnal action. a multitude of events accompany the launch of the film, mingling porn and art as two of today's most lucrative industries." (from ubuweb)
watch the whole thing here. fascinating. nsfw.