"To blanketly say, you must be naked to pass my class � it makes me sick to my stomach."

Says the mother of a student at the University of California, San Diego. 

UCSD professor Ricardo Dominguez has been lighting his classroom by candlelight and baring it all alongside his students as part of the assignment for 11 years and never received any complaints, he told the TV station.

�It�s a standard canvas for performance art and body art,� Dominguez said. �If they are uncomfortable with this gesture, they should not take the course.�