Coca-Cola 1957
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The ad above is for Coca-Cola from 1957. There is a lot of activity and intimate tension going on between the couples. They are all having a great holiday time, but there is also plenty of flirting going on: the couple by the fireplace, the girl holding the man's wrist while pouring coca-cola into his glass, and the girl in the background tempting the man outside with...coca-cola. The hidden message seems to be that if you drink coca-cola, it will lead to more...fun things in life.
This ad may not be considered "sexy" by today's standards and "in your face" advertising, but it certainly does have a lot of great taste and sensibility, which is sorely lacking today. Personally I find the suggestiveness in this ad depicting male/female relationships, sexier than many ads today.