The infamously ill-tempered German actor Klaus Kinski described pretty much every film he ever made as "a piece of sh*t". He was obviously off-base with stuff like "Aguirre, the Wrath of God" or the classic spaghetti Western "The Great Silence". Here though he was pretty much right on the mark. This is a very low-rent version of the Jeckyl and Hyde story. Kinski plays a retired doctor and jealous husband who returns with his wealthy wife (Katia Christian) to her family castle. He discovers his late father-in-law's basement laboratory, and angry at the attention his wife is paying to an old boyfriend, starts messing around and somehow turns himself into a slobbering, sex-crazed monster! Kinski is WAY over-the-top with a hysterically eye-rolling, pancake-makeup smeared performance. His victims, of course, are pretty much all attractive young women, generally ranging from scantily clad to completely nude. Gorgeous Dutch actress Katia Christian (from "The Designated Victim") also models her birthday suit for about ten minutes near the end. But the abundant female nudity here,while somewhat enjoyable, is the equivalent of spraying French perfume on a rancid turd.
The director Sergio Garrone was a hack among hacks when it came to Italian directors. Like fellow hacks Bruno Mattei and Rino DiDilvestri, Garrone later got involved in the vile Italian "Nazi sexploitation" genre, but unlike the other two he couldn't even pull off vile successfully--his entry, "SS Experiment Camp", was laughable and boring (albeit still banned in Britain for some reason). It occurrs to me that given the nepotism in the Italian film industry Sergio Garrone might be related to the talented, modern-day Italian director Matteo Garrone (of "Gommorah' fame), but if that's the case the apple fell far, far from the tree. I'd recommend this only to fans of unintentional comedy or those who want to see a particularly mugging performance by Kinski or a especially undraped performance by Katia Christian.