Low-cost pin torment

Give this a shot: Grab two pantyliners (those adhesive pads you put in your underwear, roughly the size of thumbnails) along with about twenty thumbnail pins (also known as pushpins or drawing pins). Peeel back the backing from one liner and drive the pins through it, going from the sticky side toward the interior. Distribute them evenly across the pad. Then press the second liner down so its inner surface meets the adhesive of the first. The pin caps get trapped between the layers and remain secure. You now have a double-layered pantyliner with sharp points facing inward. Secure it in your panties, string bottoms, or tights exactly where needed, or create two more to stick into your bra cups. Keep them on as long as you can tolerate until your release. Trust me, the pain is intense but manageable; expect some scratches rather than actual wounds.