The Plaster Casters. Cynthia and Dianne Plaster Caster in Chicago, shot for Rolling Stone's "Groupie Issue," 1968. The Casters were notorious for making molds of rock stars' penises including one of Jimi Hendrix's. "These two teenage girls, they were in art school and they were learning to do body casting," Wolman says. "The one on the right would give head to the rocker and the one on the left, Cynthia, would mix up this alginate and when the guy was hard she'd slam this can of stuff on his dick. Then she could make the actual cast out of the mold. Cynthia is in her Fifties now and still doing it. But now she's doing the oral sex herself, too."