These Jeans Have A Zipper For Your Butt And We Have So Many Questions About It. by Rayne Ellis. April 13, 2017. YouTube. It's 90 degrees outside.

Yet while the zipper established itself on high, button fly enthusiasts continued a guerrilla campaign, eventually clawing back a stronghold in higher-end denim in the mid-to-late 2000s.

If you look closely at the zipper on your pants right now, odds are that it has 3 letters engraved on the tab: "YKK." Those aren't the initials of the inventor of the zipper — his name was ...