Four hands are not really fun if two girls are doing different types of massages. You definitely need two complete separated systems to feel them. Haha ... I won't have four hands from Thai girls. Don't think I could handle the pain if my two legs were stretched at the same time. och ... haha... Can you imagine what that funny posture would be if two legs、arms were moved around to the different directions, upward, backward, to the sides...? A frog?