Artist Hans Reudi Giger, was a Swiss-born proponent of “biomechanical art” blending human and machine. His work in the 60s and 70’s went on the influence monster and set design for the Alien film series. He often collaborated with his muse and sometimes lover Li Tobler until her death at age 27. Her face is visible in some of his best known work.
A lot of his art was also very much influenced by genitals. Afaik the first scripts of the Alien movie were also a lot more sexual, including a sex scene between the xenomorph and Ripley.