Possible Clues:

• 'How ___ Your Mother'
• '___ a man with seven wives'
• TV's 'How ___ Your Mother'
• 'Since ___ You Baby' (1956 hit)
• "How __ Your Mother": CBS sitcom
• "How — Your Mother"
• "___ Him on a Sunday" (The Shirelles)
• '___ a traveler from an antique land': 'Ozymandias'
• "... ___ a man with seven wives"
• ''--- Him on a Sunday''