Mentored by a disembodied brain suspended in a jar of bubbling liquid, mad scientist Dr. Humpp (Aldo Barbero) instructs his monstrous automatons to kidnap highly sexual men and women for use in his diabolical experiments. With the help of sexy blonde assistant Enfermera (Susana Beltrán), Humpp doses his helpless victims with aphrodisiacs, using the strength of their passion to create a serum to nourish his body and increase his lifespan.

Reporter George (Ricardo Bauleo) investigates the case, but is captured and finds himself the subject of one of Humpp's experiments, forced to experience heightened sexual pleasure with beautiful brunette Rachel (Gloria Prat). Is there no end to Humpp's cruelty?

A sex movie with horror overtones, The Curious Dr. Humpp is packed with nudity and nookie from the get-go, the mad scientist shenanigans merely the catalyst for numerous scenes of softcore rumpy-pumpy. All of the romping and humpping soon becomes rather tedious, but the plot is just about daft enough to still make this late '60s trashfest fairly entertaining for those who enjoy offbeat cinema.

This particular viewer found the kidnapped hippies hilarious, couldn't help but be amused at the idea of a monster paying a visit to his local drugstore, and perked up every time the lovely Ms. Prat was on screen and unclothed.