Which pioneering advertising campaign of the 1920s is credited with popularizing the concept of 'halitosis' to sell Listerine mouthwash, increasing sales from $115,000 to over $8 million in just 7 years?

Before the digital age transformed how products were marketed, advertising underwent a fascinating evolution that shaped consumer culture as we know it. In the late 19th and early 20th centuries, as mass production created abundance, innovative retailers and manufacturers pioneered advertising techniques that would fundamentally change how products were sold. This poll explores a pivotal moment in retail history when advertising campaigns began to scientifically target consumer psychology.

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The 'Often a bridesmaid, never a bride' campaign that transformed bad breath from a social faux pas into a medical condition requiring treatment
The 'Clean Mouth, Clean Mind' campaign that associated oral hygiene with moral purity and social advancement in post-WWI America
The 'Doctor's Orders' campaign featuring white-coated physicians recommending Listerine as an essential part of daily health routines
The 'Whisper Test' campaign showing couples in intimate conversations, implying Listerine users had more successful romantic encounters