From the earliest days, a hint of sex has always helped sell motorcycles—not that they've needed much help, what with those top-notes of speed and power, and that freedom-of-the-road finish. But sex aside, motorcycles have inspired extraordinary work from generations of graphic designers. The proof, as they say, is in the posters. Here, some of our favorites...Popperfoto/Getty Images Ciao, Garabello! Swim Ink 2 LLC/Corbis via Getty Images Up and Away Swim Ink 2 LLC/Corbis via Getty Images Sexy Beast Heritage Images/Getty Images Blowin' in the Wind David Pollack/Corbis via Getty Images To the Point Michael Nicholson/Corbis via Getty Images Britannia Rules the Roads Swim Ink 2 LLC/Corbis via Getty Images Go Man, Go Heritage Images/Getty Images Built for Two (Or One, Whatever) Heritage Images/Getty Images Everyday Thrills Popperfoto/Getty Images Size Matters Swim Ink 2 LLC/Corbis via Getty Images Take Flight Roger Viollet/Getty Images Military Grade Swim Ink 2 LLC/Corbis via Getty Images Riding and Nothingness Movie Poster Image Art/Getty Images Faster!