A reflexive relationship is a relationship connecting an entity to itself. A reflexive relationship can be one-one, one-many, or many-many.
A reflexive relationship can be a one-one relationship. For example, LDS Fragment 12-1 indicates the following:
Each student can tutor one student.
Each student can be tutored by one student.
Whenever you see a reflexive one-one relationship on an LDS, your first instinct should be to see if it is missing a chicken foot. In most cases, the users will indicate that the reflexive one-one relationship ...