Nora used to tell us that.
Nora is a friend on an old mom's email list I attended for years. She has a son, whom she homeschooled. As we talked on our list, she would talk about how he would be so involved as a teen in his projects and her role was to:
"Slip a ham sandwich under the door.." as he worked.
Nora, I have thought of you so often and slipped many a sandwich, metaphorically or actually!