Spermula (1976) - Bat, Bat, Bat
Róisín Murphy, 'Incapable'🪄 + Charles Matton's Spermula (Music Video Edit)
The story is based around "spermulites", the alien inhabitants of a dying planet. The only way they can save their planet is by sucking the men of planet earth dry of sperm, kind of like horny vampires.