According to star Jean Seberg's biography the actress was rather embarrassed to appear in this film because of its lurid subject matter. She only took the role due to financial matters.
Barry Stokes would subsequently play the very similar role of a male intruder in a exclusively female household in Norman J. Warren's 'Prey' (1977).
Like numerous other fictions of the 1960s and the 1970s, it is wrongly mentioned in the dialogue people affected with XYY syndrome would necessarily have criminal tendencies,
The sexual relationship between Miss Seberg's stepmother and Marisol's stepdaughter in this picture calls to mind the Elektra complex her character had as daughter to David Niven as father in "Bonjour Tristesse" 15 years earlier.