8 Things Women Don’t Know About Their Underwear [VIDEO]

How well do you know your underwear? That's a weird question.

But it's pretty interesting, and so is this BuzzFeed video I found this morning.

Why did I click on it? Duh, because I wanted to know if I knew the 8 things that they thought woman didn't know about their underwear.

They proved me wrong, I don't think I knew any of these, including my favorite three pieces of trivia:

• The average U.S. bra size is 34 DD
• Mark Twain invented the modern bra clasp.
• Bras were originally one size fits all.