Reportedly, during development and prior to production, actor Graeme Blundell didn't want to reprise his part as Alvin Purple. Apparently, Blundell wanted to play a gangster. Around the time, the film The Godfather (1972) was very much in vogue. As such, the script was written with gangsters and a gangster role of Balls McGee for Blundell. Consequently, only the first act (third) of this movie is most like the original The Sex Therapist (1973), the rest of the movie being more of a mob-comedy.
A number of the actors who appeared in this movie had also appeared in The Sex Therapist (1973) but in different roles. Sex-symbol Abigail was a Girl in See-Through on a Melbourne Tram in the first film and shop-girl Mae in this movie; Noel Ferrier was the Judge in the first film and the villain The Hatchet in this movie; Penne Hackforth-Jones was psychiatrist Dr. Liz Sort in the first film and Captain of the Women's Cricket team in this movie; Kris McQuade was Samantha in the first film and Mandy in this movie; Dina Mann played Shirley in the first film and a woman cricketer in this movie; Jon Finlayson was Liz's Lawyer in the first film and The Magician in this movie; Clare Balmford was the First Nun in the first film and an Employment Clerk in this movie whilst Debbie Nankervis was a Girl in a Blue Movie in the first film and a woman cricketer in this movie. Moreover, though Graeme Blundell plays Alvin Purple in both films, Blundell also plays another character, Balls McGee, in this movie. Alan Finney plays Alvin's friend Spike Dooley in both pictures.