Totally dumb-ass 1960s sexploitation schlock written by Edward D. Wood Jr (under the pseudonym “Akdon Telmig”, an almost anagram of “vodka gimlet”, presumably the inspiration for this “masterpiece”).
There’s not much of a plot to speak of. A prehistoric tribe, led by the over-sexed chief Olaf (Gary Kent** - The Thrill Killers / Satan’s Sadists / Psych-Out), who has a 1965 Rolling Stones haircut and a penchant for grapes, are being terrorised by a (plastic toy) T. Rex. That doesn’t stop them from having lots of (simulated) sex. There’s plenty of t&a, and being late 1960s, actual pubic hair, plus a guy in a gorilla suit (yay!), and some stock footage of lizards-masquerading-as-dinosaurs fighting.
There’s one good joke. Olaf proclaims…