This was actually shown as part of a psychology class I took in college in 1980. It was used to demonstrate the stages of sex among couples (male/female). To be honest it was hardly exciting. The women were, to put it bluntly, not good-looking and the guys weren't much better. No plot or story--just sex. It was made on next to no budget (it shows) and was actually interesting in a psychological sense. It DOES show the stages couples go through in a sexual relationship and the film was hardcore but not in an offensive way. Also the on screen couples seem to be enjoying themselves. So it's OK to see for psychology only. A few of the actors went on to pretty successful porn careers.
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