I've been married to a dental hygienist for years and if you think I haven't heard "Use the Floss" you'd be mistaken.

Trivia:

Attended Nile C. Kinnick High School (known as Yo-Hi) in Yokohama, Japan, where as a senior he played Henry Aldrich in the high school production of Clifford Goldsmith's "What a Life". School is now on the Yokosuka Naval Base in Japan, where it is known by its original name, Kinnick High. Original site of the high school where Hamill acted is now a MyCal department store.