People who walk around naked at home might be showing off more than just their flesh.
Scientists believe the habit could be a sign of high intelligence.
A study by the University of Rochester in New York looked at how different everyday behaviors are linked to people who display high intellect.
They used data from more than 700 Americans who participated in a survey in the 1990s that reported day-to-day activities and personality traits.
Using the results, the researchers then looked at which specific sets of behaviors were most associated with different personality traits.
They found that people who said they lounged around their houses with no clothes on more than 15 times a year also displayed higher intelligence.