Who commissions these things? A study reports that women are aroused by the sounds of luxury cars' engines. "The 40 participants listened to the recordings of a Maserati, a Lamborghini and a Ferrari, along with a Volkswagon Polo, before having a saliva specimen collected" to measure their testosterone levels, which in turn indicates arousal. Although the Volkswagen left everyone cold, a researcher says that with the pricier models, "we saw significant peaks, particularly in women...The roar of a luxury car engine does cause a primeval physiological response." In us, that primeval response is also known as our "douche radar." [Telegraph]