Sylvie Monthulé’s marvellous work was my first guess too. But whilst she has created some arches that hold the labia apart, I haven’t been able to find that two part clasp anywhere. Any clues or suggestions welcomed…

Edit: Current best guess for this device is a labia clasp created by artist Biank Rodalquilar. Many thanks to the anonymous reader whose tireless research uncovered this gem! She shall be rewarded…