“One (perhaps somewhat funny) takeaway message from our study would be: if you are choosing a date, beware of highly narcissistic men who are simultaneously low on baseline testosterone – in our studies, they were the least generous (and most selfish) in their decisions,” Czarna added. “They shared the least resources with others. So, when going on a date with one of them – prepare to pick up the bill. Meanwhile, men who were low on both narcissism and testosterone were highly generous.”

What?