Telltale sign you have gotten sick of Tumblr: when every page on your dashboard is constant close-up pictures of penises.  I mean don't get me wrong, I like dick like the next gay guy, but I don't need to see it every single day at that close-up of a view.  It just tells me that you are very proud of your penis and dislike every other part of your body.  And I’m getting sick of it.