There were a lot of post-nuclear-apocalypse type movies in the 1970s, not surprising considering the politics of the time, but "A Boy And His Dog" is quite different. In a crazy way, this film tries to be both a sex comedy and a bleak "Mad Max"-style action film at the same time, as Don Johnson and his telepathic dog search the post-World War IV desert in search of women.
It's strangely captivating, and for a 1974 film it is *incredibly* dark. It is very thought-provoking in terms of mysogyny, and human attitudes towards women and breeding. It is a very bold film that will definitely give you food for thought, especially in the final scenes. If you're a woman you may find some scenes extremely uncomfortable, even by today's standards.
There are plenty of twists and turns. Halfway through the movie you suddenly find yourself in an underground community strangely similar to the TV series "The Prisoner" or some of the absurd 60s movies like "Head".
It is NOT a high-budget movie- some of the explosions do look a little on the cheap side, but it doesn't really matter. It is NOT a horror movie, though there is some gore. It is DEFINITELY NOT an erotic movie, although there is some nudity. The original story is the key.
Yes it may have dated a little and it may look a bit thin in places, but if you can put up with that, it's really very good.