Samuel Fuller
1964

A melodrama about a prostitute who decides to turn her life around in a small town.
It's got sort of a 60s "social problems" film feel, but it's really interesting to look at it in contrast with Written on the Wind, which was a much more mainstream example from a couple of years earlier.
Only instead of hinting at homosexuality, nymphomania and pseudo-incest, The Naked Kiss is like "This is a prostitute. This is a pedophile." It's very honest.
There are some really striking scenes. The opening, where she totally beats her pimp senseless and takes the money she owes him to this wild jazz score, then it cuts to her putting on her wig and fixing herself up in the mirror with this normal normal score, is killer.
There is some dialogue that sounds painfully cheesy, also, but I think that judging something this obviously melodramatic by realistic standards is totally useless. Because it's dealing with a dark world, but it's not exactly the real world and it's so well put together you can't help but like it.