Posner's assemblage sculptures of girdles, women's shape wear, compression garments, medical accessories, broom handles, plants, and other objects become actresses in a feminist interpretation of the Pygmalion myth. As a feminist lesbian sculptor, Posner shapes garments intended to sculpt the bodies of women into ghosts and mirrors, their hollow forms holding space for impossible bodies. In the Up to and Including Her and Spell for Moving Melancholia videos, Posner's body becomes a sculpture with agency. In her Butter Body Politic works, Posner uses butter as a metaphor and proposition for a slippery, feminist, and spiritual body politic.