All of a sudden their an expert in politics or are watching funny dog videos on Youtube when you know that they don't even like animals that much; after all, they never wanted to get a pet with you. But be careful because this is where they'll slip up. They'll want to talk about their love interest without revealing to you that they actually have one, so they'll say that they learned this new knowledge or hobby from a friend or a work colleague, yet you've never met this friend or work colleague.
