Wim Delvoye

Wim Delvoye is a Belgian conceptual artist known for a number of unconventional projects, these include tattoo'd pigs, shitting machines... and best of all the 'Euterpe' for which the artist asked some of his friends to paint parts of their bodies with small amounts of barium and then have sex in medical clinics. The results are these explicit x-rays, which when presented live are pressed together like giant stained-glass church windows.

Official Site