Dore O. and later Nekes speak to each other and into the camera, slowly and deliberately like a speech exercise, quickly like a tongue twister or in competition with each other, accentuated rhythmically or rubato, until the silent noise becomes piercing and rings in the ears. As in a mirror joke, Zerroptik also involves the viewer in the erotic duet, which persistently elicits all the comedy and latent horrors of a sudden discovery from the field of associations of the strange sentence.