Companies tend to take full advantage of the old adage, "sex sells."
While most of the companies on our list, like Dolce & Gabbana and Calvin Klein, often go the sexy route, others, like a flower-delivery company and a car maker, may surprise you.
We also got to see the steamy side of celebs like Michael Phelps and Katie Holmes.
Olivia Munn for PETA – although she was heavily Photoshopped.
Michael Phelps for Louis Vuitton. He was accused of breaking Olympic rules to make this ad.
The rule, put into effect this year, stated that Olympic athletes could not be featured in advertisements for non-official sponsors from July 18 to August 15. This Louis Vuitton ad surfaced in early August. Phelps' agent said the Olympian did not violate any rules because the image was used without his authorization.
Katie Holmes for jeweler H. Stern. Her ex Tom Cruise, her ex was said to disapprove.
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