One of the fundamental problems for pornographic films is to justify the amounts of sex (or nudity) which the genre demands and not lose the contact to real life as we know it. Most makers of pornographic films elect to ignore this problem completely and not bother with plot, realism, or other worrisome concepts of the kind.
In this film the writer chose instead one of the tried and tested ideas to resolve the problem: most of the sex is not for real, it is merely happening in somebody's mind. This idea has been used in the films of the Night Trips series, but the idea is much older - even Russ Meyer's immoral Mr Teas is based on essentially the same inspiration. In Délires, Catherine (Dawn Cumming) plays a shy, plain-looking secretary with not much of a social life to speak of. She envies her more glamorous colleague Sylvie (Erika Cool) and her decidedly unprofessional relationship with boss Marc (Guy Royer). In Catherine's dreams, it is a different: she's made-up to look more glamorous, there are no more traces of shyness, it is her who's loved by Marc (while Sylvie suffers rejection), and her imaginary acts of carnal enjoyment get increasingly adventurous. In real life though, Catherine remains timid and unloved, and her constant day-dreaming pushes her not only into embarrassing situations but also to the edge of sanity.
In other words, this adult film has a proper story to tell, but make no mistake: the focus is firmly on the sex scenes - as one would expect in the genre. Similarly it is not unexpected that Catherine's phantasies are better aligned to male than female ideas of a good time. Despite all the sex, the film does not score particularly strongly on eroticism - for this the sex is too obsessive and disturbing. The production values are sufficiently good to support the story, perhaps comparable to a minor feature film, and even the acting is competent.
