A rare display of self-awareness

I found, as I sorted through weeks of unread e-mails, a joke Mom had sent me, titled "Jewish mother." It [i.e. my translation of it] follows:

A Jewish mother sticks her head outside and screams to her son, playing in the yard, "Arkasha, come into the house!"

Arkasha looks up and yells back, "Am I cold?"

The mother replies, "No, you're hungry."