Can be done with or without vibrator.
Use q-tips\cotton swabs to access the small openings and gently caress, poke, and tease yourself. If really daring, use toothpaste on the q-tip.
After that, to get a more intense sensation, use a thumbtack to gentle poke at yourself. To reduce chance of injury you can choose to dull the tip by scraping it over a rock.
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