Stainless steel chain, I’ve use a heavy dog collar, you can use any gauge chain, about 18” or longer. Be certain the links are welded or very smooth. You can heat or chill the chain, use plenty of lube. Gently massage your ladies vagina, slowly teasing and fingering her. Slowly insert chain, link by link, remember plenty of lube. Once the chain is fully inserted you can manually stimulate her with fingers or use vibrator. The weight and size of the chain will be unlike any thing she’s ever felt in her love canal. As she reaches climax quickly pull the entire length of the chain out of her hot wet hole. She’ll experience an orgasm like never before, she’ll squeal, moan, cream and maybe even squirt. One of the best bedroom sessions we ever had.
Maybe this?