The flower petals and delicate nature of this soft textured item is meant for external stimulation. As a sensory squishy, stress squishy, or even as an adult novelty tchotchke this item is not meant for penetrative use. simply cup the grinder in your palm, add your favorite water-based lube. Caress, slide, and pulse on your erogenous area of choice. These are ideal for folks who enjoy grinding. You can place the grinder on pillow or comfortable surface and ride on top. Experiment with pressure to figure out the right amount for you. Start slow and find which sides and angles work for you! NOTE: This is a handmade item, meaning each piece is unique. No two color patterns are exactly the same!