When the British Office of Government Commerce unveiled its sleek logo redesign in the English press flipped it 90 degrees to show it as a man "enjoying" himself, forcing the embarrassed OGC to scrap the design.
In the Italian clothing company A-Style created a stylized 'A' that intentionally looks like two people having sex to create provocative buzz. More than 20 years later, many people still don't realize the company's in on the joke.
A logo is the graphic representation of a brand, but for these companies, "graphic" is an understatement. It's actually pretty remarkable how many of these unsubtle innuendos slipped past the companies who approved them.