"A Woman's Best Part" joke

Duane rents an apartment in New York, and goes to the lobby to put his name on
the group mailbox. While he is there, an attractive young lady comes out of the
apartment next to the mailboxes wearing a robe. Duane smiles at the young lady
and she strikes up a conversation with him.
As they talk, her robe slips open, and it's quite obvious that she has nothing
on underneath. Poor Duane breaks out into a sweat trying to maintain eye
contact. After a few minutes, she places her hand on his arm and says, "Let's go
in my apartment, I hear someone coming..."
He goes with her into the apartment, and after she closes the door, she leans
against it allowing her robe to fall off completely. Being completely nude, she
purrs at him, "What would you say is my best feature?"
The flustered, embarrassed Duane stammers, clears his throat several times, and
finally squeaks out, "Oh, it's got to be your ears!"
She's astounded, "Why my ears? Look at these breasts! They are full, don't sag,
and they're 100 percent natural. My buns - they are firm and do not sag, and
have no cellulite. Look at this skin, no blemishes or scars. Why in heaven's
name would you say my ears are the best part of my body?"
Clearing his throat once again, Duane stammers, "Outside when you said you heard
someone coming? That was me."