Are you a man with a sudden hankering for a sports car, a fancy house, or other status symbols? Blame testosterone, a new study says. The research published in the journal Nature had an intriguing methodology. More than 240 participants were split into two groups — one was given single doses of a topical testosterone gel, while the other was given placebo. Four hours later, the study subjects were assigned a battery of behavioral tasks and surveys. The results were striking. Read more at Fortune.