Super stylish giallo starring the very sexy Edwige Fenech as a woman who's a bit nutty but she has good reason to be as she's being stalked by a maniac who wears black gloves and slices up gals with a straight razor. She's also involved in a love triangle(rectangle?) and gets into some kinky sex involving blood and broken bottles. All the standard tropes of this genre are present here(including a whole boat-load of plot-twists that show up towards the climax) but they're all laid out really well and this one has shot to near the top of my personal favorite giallos list.
Director Sergio Martino would follow this with TORSO which is an example of a gorier giallo that plays more like a slasher flick but I don't think it tops this one in anything but blood. I really need to check out more of Martino's thrillers from this era.
It's a bit sad that by the 80s slasher flicks would replace films like this but not have any of the flair that these movies exhibit. AKA BLADE OF THE RIPPER and THE NEXT VICTIM!