A new study in the UK confirms that women like fast cars, but apparently it's not the sexy curves of a Lamborghini, Maserati or Ferrari that turns them on. Researchers discovered that it's actually the loud sound of their engines revving that gets a woman's motor to hum. The study was conducted with 40 participants that included both men and women who were played recordings of a Maserati, Lamborghini, Ferrari and Volkswagen Polo engine. Afterwards they got their saliva swabbed and analyzed for the presence of testosterone. A higher level of the hormone in their spit indicated that the subjects were more aroused, and the results revealed that 100% of the female participants experienced a big jump in testosterone levels after listening to the Maserati. Chances are the Maserati engine was actually sourced from Ferrari, but we don't know if the results after listening to the Maranello mill were identical. And what happened after participants heard the Polo's wheezy motor? Testosterone levels fell across the board.