'Il Pavone Nero' aka 'Voodoo Sexy' (1974) – Osvaldo Civirani.

This sensationally smut-laden, orgiastic odyssey by scurrilous smut-lord Osvaldo Civirani ostensibly concerns the jet-setting, sun-seeking,  hedonistic pleasantries of a married couple as they initially enjoy an especially sultry sojourn upon a beauteous, sin-drenched Haitian island, where they lustily avail themselves of all the exquisitely heady delights so generously bestowed upon them, and yet, as they continue to party increasingly heartily, the sexily sinister Balaga (Don Powell), that truly villainously libidinous, orgy orchestrating, bad mojo workin', nastily necromantic nemesis has diabolically degenerate designs on pretty Laura's delectably bodacious bod (Karin Schubert), the blissfully blithe wife of the handsome and no less oblivious Marco (Chris Avram), and before you can say Joe D'Amato woz 'ere, both hunky husband and winsome wife are up to their furry coconuts in deliriously psychedelic voodoo shenanigans, thereby inaugurating a sweaty smorgasbord of bravura Baron Samedi-inspired iniquity that soon threatens their supernaturally-warped sanity! If skeevey 70s horndog-hoodoo is what you-do, don't be a dreadful doo-doo head, and miss out on the disco-infernal, island-set, whirling dervish insanity of 'Voodoo Sexy Erotico'!!! And the bouncy, Black magic B-Movie boogie by funky composer Coriolano Gori is guaranteed to put one hell of a kinky spell on you, baby!