Boxers vs. briefs.
It's a time-honored debate.
We've been wondering, what does Jake Gyllenhaal think?
Well, funny you should ask. A New York shopper in Bloomingdale's underwear department recently watched the Brokeback Mountain and Zodiac star shopping with a salesman - and deciding for himself where he stands on this hot issue.
Or at least trying to.
"[They were] combing through every style... A good 10 minutes later, Jake was still at it... holding up a pair of tight white briefs that he pulled out of the package to examine, as if he'd never seen tighty whities before in his entire life," an eyewitness said.
"It was hilarious. He looked very confused and had a furrowed brow... He was examining underwear like an anthropologist in the city's most highly trafficked department store."
Alright, well, that tells us nothing, other than that Jake wears something for support. Which is more than we can say for other celebrities. Such as Britney Spears.
Or Jake's BFF, Matthew McConaughey, for that matter. At least we're guessing. This is a guy eschews clothing of all types.