Violenza in un carcere femminile AKA Chicks in Chains (1982) - Bruno Mattei

The reporter Emanuelle (Laura Gemser) is on an undercover mission in a prison. If you ever watched any of the women-in-prison movies of the 1980s, you know: prisoners are not treated kindly there. However, "Violenza..." is a little bit superior to most of this genre insofar as it is not only into shower scenes. It's a tough, dark, fast moving flick with an amazing Laura Gemser and her husband Gabriele Tinti as a doctor who helps her to escape. The slowly evolving love interest between the doctor and Emanuelle is well scripted. Not for the fainthearted, however, is a scene where Emanuelle is locked up in a dark cell with a bunch of rats attacking her. Two years later, director Bruno Mattei went on to shoot "Rats - Notte di Terrore" with many more rats - a kind of unhealthy fascination, if you ask me. Laura Gemser and Gabriele Tinti continued with another prison movie "I Violenti" which is a sequel (not as good as the first film) to "Violenza..." although Tinti plays a different character.

Emanuelle fuga dall'inferno AKA Emanuelle In Prison (1983) - Bruno Mattei

From the net:

While four male convicts are being held temporarily in a women's prison, they succeed in taking a group hostage and demand their freedom. The district attorney retaliates by forming a select squad to eliminate the troublemakers and a bloody battle ensues.

Caligula et Messaline AKA Caligula and Messalina (1982) - Bruno Mattei

From IMDB: "Not nearly as sexually graphic or violent as either the original 'Caligula' or D'Amato's film, this is strictly soft core all the way - bar two scenes involving mating horses (taken from 'The Beast') and donkeys (filmed specifically for this film). I wouldn't call this historically accurate exactly (there's an understatement!), but I'll let that pass as the film at least tries to pile on the sleaze to make up for its other shortcomings: even though everything that goes on here is too cheesy to be offensive. For instance, during a torture sequence, a man is seen chained upside down and hacked between the legs with a sword, causing him to bleed to death. This could have been disturbing, if not for the fact the victim has been stripped down to a ghastly pair of black pants, which just made me smile with amusement. The rape of a bride and groom, also seen in the Penthouse version, is re-played here, only Caligula rapes the guy with his penis this time and not his fist. There is also a threesome involving a midget and scenes of incest."