Pretty Wet Lips (1974)

A psychiatrist interested in how people get to where they are in space and time, interviews individuals involved in crime as we see the events though flashback. Chickie & Buster, cruise along in their VW bus and kidnap a school girl hitch hiking. They abuse and rape and then arrive at a suburban home where Buster attacks the owner. A neighbor, Brigitte Maier, comes over to visit and is also attacked. Finally the husband, who has spent the day with a call girl, comes home and after being attacked by one of the women he turns the tables and saves the day.