Flesh Gordon (1974)
This parody of Flash Gordon defies classification. Some people may say it's porn, but the special effects and script are just too good for porn. Flesh Gordon, Dale Ardor and Dr. Flexi Jerkoff travel to planet Porno to fight Emperor Wang (the Perverted) who is pointing his sex ray to Earth. In planet Porno they meet giant penis-shaped monsters, lesbian revolutionaries, robots that attempt to screw them, cannibal dykes, and Prince Precious... if you're a fan of the original serial you'll enjoy this movie. Go watch it! IMDB entry.