““I have always been puzzled, anyway, by the economics of the thing, because I would pay the dentist, and he would presumably give his wife the money for her courses at the college, she would pay the college, the college would pay my husband a separate fee for her tutorials, and then my husband would give me money for the dentist, I would pay the dentist, the dentist would give money to his wife, and so it would continue. I thought that if no one paid anyone, it would work out just the same, but that didn’t seem quite right, either.””