Les dents de ma mère (1991)

Paulette, Jean-Christophe's mother, talks too much; after ten years of struggle Jean-Christophe notices that Paulette talks less, but one night he sees his mother's dentures in a tooth glass. Kind friends explain to him that Paulette has passed from the oral stage to the sadistic oral stage. The mother shows her teeth, I love you, I crunch you, it's sure death...