It’s overhearing this conversation between a man and a woman in the supermarket checkout line: (They are both very tall and very skinny, and are only purchasing one item -- a pint of chicken soup from the deli.)

Man: So, should we eat the soup, watch the movie and then go in the spa?
Woman: Well, I’ve been thinking about this.
Man: I thought you might have been.
Woman: I’ve been thinking about this chicken soup all day.
Man: We could watch the movie, eat the soup, and go in the spa.
Woman: Yeah. Or we could go in the spa, eat the soup and then watch the movie. But it might be better to eat the soup, watch the movie and then go in the spa.
Man: Or we could eat the soup in the spa.
Woman: We could.