Two Irish nuns have just arrived in USA by boat, and one says to the other, "I hear that the people in this country actually eat dogs."
"That's very odd," her companion replies, "but if we're going to live in America, we might as well do as the Americans do."
As they sit, they hear a pushcart vendor yelling, "Hot dogs, get your dogs here," and they both walk towards the hot dog cart.
"Two dogs, please!" says one. The vendor is very pleased to oblige, wraps both hot dogs in foil and hands them over.
Excited, the nuns hurry to a bench and begin to unwrap their 'dogs'.
The mother superior is first to open hers.
She begins to blush, and then after staring at it for a moment, leans to the other nun and in a soft brogue whispers,
"What part did you get?"
(with thanks to Cathal Cavanagh.)