This is a film with extraordinary vision as it was way ahead of its time. 1973... the gay rights movement that started at Stonewall was only 4 years old. Gays, in general, were still mostly "closeted" with their own underground society. Psychologists had just a few years earlier declared homosexuality not to be a personality disorder. Homosexuality as a topic for discussion was a new frontier for most Americans.... So here comes a film depicting gay men in an in-depth way involving their feelings, their relationships, their social interactions- full frontal nudity- and prophetically, the main character, David, as a priest who leaves the church after coming to terms with his sexuality. All "taboo" subjects in mainstream America involved at the time with Richard Nixon and the Watergate hearings. It is amazing that this film was made in 1973 and that the producers were able to get actors with the courage to participate in the making of such a film.
The storyline, in a nutshell, shows David wanting to commit to Mark. Mark does, hesitantly, due to his commitment-phobia and having a different value system, which finally drives a wedge between them and ends the relationship. David goes through the emotional ringer and then meets Jason. Jason wants to commit after a time, but David has become jaded about relationships- and commitment-phobic- and doesn't want anything more from Jason than a relationship where they just "want to be together. In a sense, David evolves into a "Mark," and Jason comes along as the new "David" about to get the same treatment that David originally did.
I liken A Very Natural Thing" to be a primitive "All Over The Guy." The story shows a vicious cycle about relationships that both gay and straight people can relate to and presents some universal truths about how gays feel about themselves being a minority group and their self-destructive tendencies due to limitations society puts on them. These are circumstance that are still very relevant today.
The ending of the film is very open-ended and doesn't resolve any of the issues the movie brings up as there are no answers for the questions this film raises. That is actually what gives the film relevancy today given the current debate on same-sex marriage (especially with the flick's marriage scene), which has the potential of breaking the "glass ceiling" on the limitations of how gay relationships can evolve and how gays can feel about themselves.
Ok! The hair styles and clothes are dated, but it's not too hard to get past. Just concentrate on the characters and the storyline/dialogue in relation to the plots you see in most current films and today's current events and this film will feel as relevant and "run-of-the-mill" as any film made in 2003, but very "visionary" and "ground-breaking" for 1973!