"Kanye is talking fashion world which is why it sounds strange to non-fashion people," says a commenter in this Metafilter discussion of the Kanye West/Jimmy Kimmel feud.
The commenter links to: "In Kanye's Defense: 11 Musicians Who Own Leather Jogging Pants: Jimmy Kimmel might not believe that leather jogging pants are a trend, but here are 15 photos of celebs who could vouch for Kanye on that one."
ADDED: "Jogging pants" is a just nicer way to say sweat pants.
And the issue isn't whether you're going to exercise in leather pants, it's whether you want your leather pants tight or loose. Everyone loves tight pants and everyone loves loose pants, but for different reasons. The question is which of your pant-loves are you going to be with today. Is it a loose pants day? If so, with leather jogging pants, you can still say yes to leather.