BVDs

BVD's is a men's underwear company, founded by Bradley, Voorhees, and Day.

Tin Pan Alley songs occassionally referenced the underwear.

 An evening spent with Hannah sitting on your knees
 Is like being in Alaska in your B.V.D.'s
 -Hard Hearted Hannah, by Jack Yellen[?], Charles Bates[?] and Milton Ager[?]