Transgression is the rule in Best Lesbian Erotica 08 (Cleis, ****), and editors Tristan Taormino and Ali Liebegott surprise even the most porn-soaked reader with their preference for extremes and the downright weird. When a teenager finds her best friend's uppity mum trapped in a PVC insect costume, she stuffs her with a brace of courgettes. Welcome to the subgenre of 'vaudevillain humiliation fetishism' favoured by author Roxy Katt.

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