Should I get the Jopen Vanity Vr6.5, Vr12, or Vr15? I like the flexible clitoral part on Vr6.5 but I like the rotating shaft on Vr12 and Vr15. I don't want something too thick. This will be my first rabbit style toy... is there something else that you would recommend? Anyone experienced with these toys please feel free to comment.