It is impossible to imagine a better mechanical arrangement for non-abrasive stimulation of the male and female genitalia than this slick 'sheath within a sheath.
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The sensations from the specialised receptors of the frenar band, frenulum and inner foreskin layer are missing.
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The foreskin contains sensory receptors called Meissner corpuscles.
to provide an aid to masturbation and foreplay.