As it turns out, the stereotypes happen to be true.  Expensive vehicles and fast driving cause men’s testosterone levels to spike, reveals a study from Concordia University John Molson School of Business.

The study involved 39 men who volunteered.  Each of the men was told to drive down a pedestrian loaded street, as well as a calm residential road.  They drove each of these streets twice, each in different cars.  The cars were a brand new Porsche 911 Carrera Cabriolet and a 93’ Toyota Camry.  A sample of saliva was taken by researchers after each drive in order to measure the testosterone levels of the men.

According to the results, it didn’t matter which street they were driving on, however after driving the Porsche the men always demonstrated an elevated and sustained level of testosterone.

The author claims that men use expensive and powerful cars as sort of “sexual signaling devices”, much like male peacocks do when they show their tail feathers.  One thing is for sure though, although men are busy trying to impress women with their hot cars, they still need to buy an auto warranty to protect them.