Tumblr is a great way to create conversations about a range of topics. You know, the usual: politics, national news, climate change, and putting pizza on a bible in the microwave. Huh? Yeah, that's right: Tumblr can get people talking, but not always about the most constructive things—but that's life, it doesn't always have to make sense. Here are the funniest threads across the Tumblr universe.