A teacher is concerned that one of her pre-school students, Alicia, insists on being called "Dr. Alicia". The teacher states that "Dr. Alicia" wears a stethoscope around her neck most of the time, and during free play she is often observed "examining" her classmates. The teacher insists she is not being inappropriate in play but her insistence on being referred to as "doctor" is strange. How do you explain it