GENDER equality

"Without confronting men’s sense of entitlement
we won’t see why so many men resist gender equality."

The riddle:
A man and his son are driving along the freeway and
they are in a terrible accident and the father is killed.
The son is brought to the emergency room of the hospital where
the emergency room doctor takes one look at the son and says
I can’t treat him that’s my son.

How is this possible?