Vito Acconci, Seedbed , 1972, Sonnabend Gallery, New York, wood, ramp, and speaker, 2.5′ x 22′ x 30′. Photo: Ealan Wingate and Bernadette Mayer The artist and poet Vito Acconci has died at seventy-seven. Acconci is best known for his performance pieces, which shocked audiences in the early seventies—especially “Seedbed,” which a New York Times profile last summer described with admirable concision: “he constructed an angled false floor at the Sonnebend Gallery in SoHo and hid himself beneath it with a microphone, speaking luridly to the people who walked above him, masturbating as he spoke.” Before he became an artist, Acconci was a writer, and in this line, too, he excelled at provocation. The Paris Review published a pair of eyebrow-raising poems by him in our Summer 1968 issue . At that time Acconci would’ve been fresh out of his MFA program at the University of Iowa, where, as the Times tells it, one of his short stories “provoked a minor riot.” It featur...