Single? Maybe it's your breath. That's the gist of this Listerine ad from the November 1934 issue of Physical Culture. The copy reads, "5,000,000 young women become of marriageable age this year... How many of them, we wonder, will make the grade? One thing is certain; they can't expect to attract and hold men if they nave halitosis (unpleasant breath). It nullifies every other charm." And just in case you still don't get it, you stanky old spinster, the final statement is "USE LISTERINE BEFORE ALL SOCIAL ENGAGEMENTS." (Click to see full-size!) [Modern Mechanix]