My PCP is Dr. Wong. My mother’s dentist was Wang (pronounced Wong.) I think my doctor’s practice does have a doctor White, but it’s a big practice.
I asked my neighbor if he knew what kind of tree a certain tree was.
“Pearlwood”.
“Huh? Never heard of that kind of tree before.”
“No, Pearl would!” Pearl was his wife.
It’d be polite if you folks making literary / entertainment allusions included a link or at least a title for the allusion-challenged amongst us who’d like to play along at home too.
As befits somebody my (all ours’) age I certainly know some Steely Dan songs. None of which come to mind with these scant clues.
Sorry to be obtuse, but won’t somebody throw me a bone here?
Dr Wu, I think?
Thanks – I had the same question!
OH - MY - GOD! This is so funny!! 
Reminds me of a joke my father-in-law used to tell. An old man is telling his friends about this great restaurant that he and his wife had dinner at recently. His friends ask him the name of the restaurant.
The old man says “What’s the name of that flower, they smell really good, have thorns…”
One of his friends says “A rose?”
The old man says “Yes, that’s it!” Then he calls over his shoulder “Rose? What’s the name of that restaurant we went to last week?”
Another joke.
NY’er talking to a guy wearing a 10 gallon Slim Pickens special, identifies himself as a Texan…
“So, what town in Texas are you from?”
“Plain ol’ Texas.”
“Yes, I get that, but what town were you born in?”
“Plain ol’ Texas!”
[Meant Plano Texas of course]
Presumably Dr. Wu, from Katy Lied.
My own real-world version of this story: many years ago I was coaching a FIRST LEGO League team of girls. We had two girls named Emily. Last names were Yu and (let’s say) Jones.
They’re discussing some task, and someone says, “Emily should do that”. Jones asks, “Which Emily?” and the answer is, of course, “You”. [Or “Yu”.] And we all looked at each other and went “Um…”
Oops, that’s what I get for starting a post after carefully verifying that nobody has replied and then not finishing it for several hours!
A Southern belle meets a group of preppy young men at a party:
“Where did y’all go to college?”
“Yale.”
“Okay…WHERE DID Y’ALL GO TO COLLEGE?”
There was an episode of Taxi where the spacey “Reverend” Jim was taking the written driving test. The others were helping him (ie, cheating).
JIM: What does a yellow light mean?
OTHER: Slow down.
JIM: What… does… a… yellow… light… mean?
(Repeated many times)
If I had a Dr. Yu, I’d milk it for everything I could get.
I wonder if there’s a Dr. Stat working anywhere.
And that is informative how?
ETA …
It turns out there’s a song by that name:
It’s instantly recognizable to me as a Steely Dan tune; their sound is pretty distinctive. But I’m sure I’ve never heard it before, not ever heard of it before. The lyrics ring no bells.
Well, you asked which song, and I made a suggestion.
I’ll grant that it’s not one of their best-known songs, but it seems to fit with what was being discussed?
I’m not all that surprised you haven’t heard it. Katy Lied is not one of their better-known albums.
Sorry for the confusion. I originally was going to post
Are you with me Doctor Hu?
Are you really just a shadow
Of the man that I once knew?
Are you crazy are you high?
Or just an ordinary guy?
–but that probably would’ve been just as cryptic to any non-Dan fans.
To be completely clear: it’s just the title that people were referring to, I think?
I don’t think the actual lyrics of the song have anything to do with it. 
Ha Ha! I think we should have an entrance exam for posters on the board.
A full knowledge of Steely Dan and Monty Python should be a minimum requirement… 
The show 30 Rock had a similar running joke but it was about Dr. Spaceman.
The joke is that the character Tracy Jordan is ranting about “Doctor Space Man” while reacting badly to medication, and of course the assumption is that he’s hallucinating. Then they find the prescription bottle that says “Dr. Spaceman”, and it turns out it’s pronounced “Spa-Che-Men”.
For more hilarity around Dr. Spaceman as ably played by Chris Parnell (also known as the voice of Cyril on Archer and a million other things), here is a “best of” clip:
