BEADS!

"She had heard about small balls that were used an an aphrodisiac in the East Indies. But how to obtain them? Where to ask for them?

"...They were made of some very soft rubber with a soft, skinlike surface. When they were introduced into the sex they molded themselves to the form of it and they moved as the woman moved, sensitively shaping themselves to every motion of the muscles, causing a titillation much more exciting than that of penis or finger. Lilith would have liked to find one, and to keep it inside of herself day and night."


--Anais Nin, from "Delta of Venus."