“When critics strain to pigeonhole a piece of music that's vaguely funky in that sleazy 70s way, the words "porn soundtrack" are often put to use. The idea that the blue movies of the 70s had even marginally interesting soundtracks is, if you think about it, a rather odd bit of received wisdom. How many people have actually seen enough of these films to say? Perhaps it's just that 70s porn soundtra”