“Vulgarity is gendered, of course.”1 —T.J. ClarkWHEN I TEACH AMERICAN ART of the 1970s, there is one work that always stops the class cold: Lynda Benglis’s ad from the November 1974 issue of Artforum. College students who respond matter-of-factly to other controversial works from the period––Vito Acconci masturbating beneath the floorboards of the Sonnabend gallery or Chris Burden’s having himself shot with a .22-caliber rifle––are visibly (and, on occasion, audibly) taken aback by the image of Benglis, naked and greased with oil, extending a dildo from her vagina. In contrast to the photographs