In Seedbed, performed by Vito Acconci in 1972, the artist lay hidden underneath the floor of Sonnabend Gallery in New York, masturbating 8 hours a day over 3 weeks. Through loudspeakers placed in the gallery, visitors could hear Acconci describe his fantasies about the people walking above him: "You're pushing your cunt down on my mouth", "You're ramming your cock down into my ass."
In 2010 Eva and Franco Mattes recreated Seedbed in Second Life.
