Invasion of the Bee Girls (1973) - Men die for excessive effort during sexual intercourse. What Does it Have to do with bees?

Invasion of the Bee Girls (1973) - In the small town of Peckham, California, many men die for excessive effort during sexual intercourse. When a scientist from the Brandt research laboratory is found dead in a motel, the government sends Agent Neil Agar (William Smith) to investigate the mysterious deaths. He suspects that the deaths may be related to some experiments of Dr. Susan Harris (Anitra Ford), who is researching bees in the Brandt facility.

"Invasion of the Bee Girls" is the best schlock soft-core science fiction movie since maybe "The Vengeance of She." It may, in fact, provide a clue to the most puzzling aspect of that 1968 epic. You will recall that Olinka Berova, who played She, was plagued by a strange buzzing in her ears. This was in fact the sound track calling her back to the trackless wastes of lost eons, although for a long time we didn't catch on. All we knew was that every time she heard the buzzing, Olinka started taking off her clothes. Members of the audience were even moved to float a few tentative buzzes themselves. Now comes a movie in which every time we hear the buzzing on the sound track a man drops dead of an acute coronary. What salvages this somewhat unlikely plot is the movie's sense of style. It looks good, it moves fairly well, the girls are pretty, Big Bill frowns impressively and there are a lot of near s-f gimmicks. My favorite was a sort of Redi-Whip cocoon that not only turns the girls into queen bees, but gives them a facial and a hairdo at the same time.  - Roger Ebert

Directed by Denis Sanders
Starring: William Smith, Anitra Ford, Victoria Vetri, Cliff Osmond.