Drucker, Jerry. "Hays Code: Out-Psyched by Hitch." Los Angeles Times 28 Oct. 1979: w4. Proquest Historical Newspapers. University of Pennsylvania. 7 Apr. 2008.

    When North by Northwest was released, the Hays Production Code still had incredible influence. Any film that did not have the official seal was essentially locked out of the major distribution and exhibition avenues. Only two films had ever bypassed the code and despite their box office successes, few studios were willing to risk losing the seal of approval. The code was incredibly strict involving moral standards, and thus sexual and violent undertones needed to be minimized to ensure the Board's approval. This article was written by an insider who had the opportunity to sit inside the Board's screening room as they watched Psycho. It became immediately clear that strong changes were needed; however Hitchcock was known for being unwilling to compromise his autonomy in filmmaking. Thus a strong negotiation ensued in which certain shots were traded with others until the film eventually passed muster.

    This showdown between the censors and Hitchcock was inevitably an escalation from his previous film North by Northwest. Full of sexual innuendo and provocative scenes, the Board had objections to many of the frequent references to intercourse throughout the film. Hitchcock carefully avoided overt discussion, often substituting the word "love" for "sex", and using imagery to imply action (for example, a shot of passionate kisses cuts to a shot of their train entering a tunnel). The final cut of the film was risqué for the time period, but managed to successfully hide the sexual references from younger and uncultured minds, which was no doubt a critical hurdle for Hitchcock to overcome in order to obtain the seal for the film.  The symbolism and innuendos created require a much more engaged viewer, which ultimately helps to maximize the effects of suspenseful situations.