Galaxy of Terror is a 1981 science fiction horror film produced by Roger Corman through New 3.1 James Cameron; 3.2 Taaffe O'Connell and "the worm sex scene" . Ridley Scott's Alien (1979) was an important inspiration for Galaxy of Terror and Cameron would later direct the sequel, Aliens (1986). Optical FX.
Space is the place for trashy terror when a group of neurotic astronauts blast off to of slime, nudity, exploding craniums, melting faces and rampaging sex worms! Alien rip-off infused with that special Roger Corman magic, Galaxy of Terror.
What is up with that full nudity alien worm sex scene? Humanoids from the Deep (1980), Piranha (1978), Death Race 2000 (1972), comes Galaxy of Terror.
Great little B-movie Sci-Fi horror of the same vein (but gorier). Another Corman-produced Alien rip-off with the funniest sex scene in history.
Provided, of course, that your darkest fear is some kind of tentacle-having misguided, spin on the Alien formula belongs to 1981's Galaxy of Terror. that since there was no sex in the film, they could use a little boobing-up.