"Fortitude" is about a woman that is nothing more than a head, connected to all kinds of machinery to perform her bodily functions for her. Everything, down to her emotions, is controlled by the machine. I wanted to flip it around and show the controls on the machine being affected by her emotions. Her hair is the only thing connecting her to her original humanity, as it is not influenced by the machinery, but by her friend and hair stylist, Gloria.
Some background on "Fortitude"- it was originally commissioned by CBS as a comedy special in 1968, but was never made (it even includes stage direction, and instructions on camera shots). It was eventually published in Playboy, however.