Sixes have told me many times that protection is a core need they have in relation to those who are close to them. You can see, then, how when they are away from their normal routine they might be overprotective (phobic) because the routine is abnormal and there are so many unknowns. On the other hand, counterphobic Sixes have no patience with your fear unless you are willing to try to overcome it, so vacations are a great arena for that conversation to take center stage.