Les Blank's benign little doc on the unchartered territory of gap toothed females is a harmless goof featuring both anonymous and famous (Sandra Day O'Conner, Lauren Hutton) endowed with the Alfred E. Neuman (MAD) grin. Engaging and inoffensive with nearly all the interviewees in good spirit dispensing interesting background stories it's overlong at 37 minutes, the topic exhausted by 25. But given the amiable charm of all the participants easy to understand why it might.