Gordon in the morning: Doesn't know his Star Wars

Chewbacca. The one thing that you know about wookies - even if you've only had a passing interest in Star Wars - is that they're big and shaggy.

So why would Gordon think a brown knitted jacket would resemble a wookie pelt? It's like suggesting that James Bond drinks cider, or that Lord of the Rings was underwritten. Pop culture 101, surely?