Though it probably attracts more attention masquerading as a soft porn film, "Primitive London" is a bizarre snapshot of the London of 1965, constructed of a series of practically unrelated scenes, some of them 'straight' documentary style (meeting Mods, Rockers and beatniks) along with staged reconstructions (a wife-swapping party, a radio voiceover recording). Some of the tenuous links between scenes are hilarious and inspired. Whether intentionally or not, it ends up being a great historical record of the fashions and excesses of the time.
However, though I'd recommend it to some people, it has to be pointed out how incredibly mysogynistic and hypocritical it is. The sometimes insane voiceover over the wife-swapping scenes describes it as "the death of love", yet the same filmmaker has no problem with continually returning to show yet another scene at a strip club. Even for the time the sexism is excessive- comments like "and women tend to get what they want" occur throughout. If you can tolerate this you're left with a curious alternative piece of 60s memorabilia.
Blu-Ray extras are pretty good- three totally unedited contemporary interviews, some more relevant to the main feature than others, and an additional 25-minute black and white mini-feature along the same lines but 'grittier'.