Here are three images from Santiago Sierra's 160 CM LINE TATTOOED ON 4 PEOPLE. The piece involves four prostitutes getting a line tattooed on their back for a hit of heroine.

This is a performance by Marc Gonzales from 1998, put to unrelated music. Unfortunately this is the only footage that can be found of this piece on the internet. Please ignore the music, and enjoy the performance.

This is a commercial made by Chris Burden in 1973. It was created to appease his desire to be on television. To Chris this was the easiest way to get onto television.