I think it's awesome how much John Waters can cross reference other movies of his in his own movies. I've listened to most of the commentary tracks. so it's no wonder I'm aware of this.
there is an R rated version of A Dirty Shame
I would not recommend this version. watch the NC-17 version
the R one is funny but boring. and not "the same" movie
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I've been watching old B&W sexploitation movies from the UK
