I ONLY gave this a high rating for what it is: Niche vintage soft-core viewing. With the Free-Love movement of the 60s also came a quickly growing of acceptance of bared breasts in the mainstream formats of film and magazines. While published nudity already existed prior to the 60's, it was mostly relegated to scientific studies or underground porn or "nudie cuties." So when it became offered to a more broader audience, it was considered cutting-edge and somewhat of a marvel. Some may not know that we, as a society, had to adjust and discover how nudity would be tolerated in society. For example: up through the 70's comparatively "harder" publications had very explicit covers, some being XXX, openly displayed in drug/grocery stores for ALL to see. Today, that kind of promotion is rarely seen even in dedicated newsstands. It's considered to be grossly misplaced if not outright offensive.
So, this film "Four Kinds of Love" was a coming-of-age film that pushed the envelope of both free-love and casual nudity on a larger stage.
This film really exists only to showcase bared breasts. There is no frontal nudity or implied sex, just a lot of topless women who casually hang out with dressed men, sometimes dancing, and thats as far as it goes. Yes, I know "full- fontal" was not "legal" until 1969 (this is a 1968 film) so I know of those limitations. Had this film been made 1-year later, who knows what the same producers would have put out? And on that note, this film closely resembles "Suburban Pagans" in just about every conceivable way: the premise is the same, the look is the same, and several of the "actors" are the same. Of the two, IMO "Pagans" is far better. There is FAR more nudity, and the addition of two spectacular specimens of the app-expanded mammalian-cage variety being Marsha Jordan and Cara Peters, which to the latter, the dance scene must be seen to be believed.