I think you need to let your characters speak in their own voice. Get inside their heads, know their wants and desires, intimate yourself with their intrinsic natures, let them breathe. They all have something to say about truth, it is your job to transmit that message.
As it is now they all just seem to say "fuckshitcunt".
(But the idea of someone "needing a banana-fuck" is pretty funny in its own right.)
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Ham-fisted ham fisting.