Riddles

[trixiet]

A riddle I heard this morning, but I didn't get it.

A doctor and his son are in a frightful car crash. The doctor is killed outright. They rush the injured youth to hospital. The surgeon takes one look at the
patient and says "I can't operate on this boy because he is my child"

explanation?...

Because the surgeon is the boy's mother, that's as old as the hills