Doctor's Family

Riddle: A doctor and their son are walking down the road. The boy is the doctor's son, but the doctor isn't the boy's father. Who is the doctor?

Answer: The doctor is the boy's mother.

Source: https://www.riddles.com/7836

A doctor and their son are walking down the road. The boy is the doctor's son, but the doctor isn't the boy's father. Who is the doctor? — Doctor's Family by Sk8ter Grl v1.

Riddle: A doctor and their son are walking down the road. The boy is the doctor's son, but the doctor isn't the boy's father. Who is the doctor? Answer: The doctor is the boy's mother. — by Sk8ter Grl v2.