"You don't know what?" she asks, teasingly, as she continues to rub against the elf in a full body motion. "You don't know how to use your tail? It's quite easy, it's just like another arm. Just think about where you want it to go," she says, her tail starting to press into Ruby's depths, twisting in very slowly, wiggling back and forth as it goes. "And it'll go there. And you know where I want it to go, don't you? It's the same place you want mine, after all."