Invasion of the Bee Girls (1973)

Invasion of the Bee Girls is very much a product of the '70s. It's also pretty much a softcore porno, and probably fits snugly into the category of exploitation cinema. Naked women abound, and it's not very PC. All the women (including the scientists) are supermodels, and all the men are sleeping around; there's even an attempted rape scene. Although that does express a central theme of the movie, which is a battle between the sexes. When men start turning up dead, apparently as the result of sexual exhaustion, city officials impose a curfew and suggest a course of abstinence (which, to their credit, the townspeople reject), inspiring resentment among a few of the local men towards women, who would seem to be responsible. It's eventually traced back to a nearby government research facility, and involves radiation and genetic mutation, where bee-minded women in lab coats (and nothing else) strip down and slather each other with ooze in an erotic group ritual, surrounded by flashing computers. Like I said, it's a product of its time.