Miss Manners: Should graduate send parents a thank-you note?

Dear Miss Manners: I was wondering if my daughter should have sent thank-you cards to my wife and myself when she graduated from college.

My wife said she should have, but I don’t feel the same way. Could you please let me know?

In the normal course of events, children take it for granted that their parents feed, clothe and educate them. In happy families, it sometimes strikes adult children how enormous an undertaking that is.