Voodoo pair "[Link]"

One the surface it would look like a pair of very odd and largely unrelated objects. The first is a voodoo doll, typical in its recognizable (supposedly) mystical form. The second one, at first glance, seems to be just a hunk of squishy clay, but when the voodoo doll is linked to a person via the absorption of the subject's DNA, the clay will take the shape of the linked person's pussy and/or cock. From there, it works as voodoo dolls are supposed to, touch the doll however you desire, and the subject will feel the same thing.

The clay is dense and somewhat heavy, 5 kilograms or so which allows it to adjust for size differences between people, and if necessary, shrink and become even denser to hide itself or simply fit a smaller space.