Naked Obsession (Spiando Marina) (The Smile of the Fox) (1992)
Spoiler Alert !
Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
This is an Italian-made erotic thriller, without many thrills in it. But there is a very nice-looking pet snake, with an even nicer-looking owner.
An ex-Miami narcotics detective named Mark who was found guilty of corruption but let off because he ratted on some drug dealers, lost his wife and child when the drug dealers retaliated and bombed their car. So he flies to Buenos Aires to work as a hitman. While waiting day after day in his apartment for the hit to happen, he becomes obsessed with listening to and spying on his beautiful next door neighbor named Marina (Debora Caprioglio) when she is having sex, which seems to be constantly. (The original Italian title is "Spiando Marina" which means "spying Marina.") One morning Mark wakes up to find that Marina has broken into his apartment by way of the balcony door. He gets angry at her, but she tells him that she was only looking for her pet boa, named Tango, who climbed over the wall that separates their two balconies and crawled under his couch. (She actually calls the snakes name when she looks for it, as if it might hear her and come to her...) "He's just a little bitty boa" who's harmless she tells him, but he doesn't believe her. He does believe her the next day when he's spying on her and sees her sitting naked on her bed caressing a very lucky Tango. Later Mark breaks into her apartment to snoop around. He opens a basket on the floor and finds the snake inside. Only in movies can people keep snakes in baskets and get away with it. Shortly after that the movie forgets about the snake and concentrates on Mark and Marina having sex any time and any place they can. I'm probably the only person who was hoping the snake would make another appearance.
The snake is a very dark Boa Constrictor, probably an Argentine Boa.