Monty Python's Flying Circus, Series 2

Doctor:
I'm afraid our regular psychiatrist hasn't come round this morning, and I've got an ego block, which is turn making my wife over-assertive and getting us both into a state of depressive neurosis.

Psychiatrist Milkman:
I see, sir. Who's your regular?

Doctor:
Jersey Cream Psychiatrists.

Psychiatrist Milkman:
Oh, yes, I know them. Right, well, what's your job, then?

Doctor:
I'm a doctor.

Psychiatrist Milkman:
Didn't I see you just now under a Scotsman?

Doctor:
Yes, but I am a doctor. Actually, I'm a gynecologist, but that was my lunch hour.

Psychiatrist Milkman:
[holding up an ink blot] What does this remind you of?

Doctor:
Two pints of cream?

Psychiatrist Milkman:
Right. I should definitely say you're suffering from a severe personality disorder, sir, sublimating itself in a lactic obsession that could get worse, depending on how much money you've got.

Doctor:
Yes, I see. And a pot of yoghurt, please.