Marty is surprised.
"What kind of bird has milk, Blankie?"
"I have no idea. But I would be curious to see how they are milked..."
The old man snorts.
"Oh my goodness! Mamo, these city kids haven't eaten bird's milk yet. Well, go ahead and make them a big bowl!"
He hangs up the phone and says with a blissful expression.
"Bird's milk is my favorite!"