The internet is a dangerously addicting place. If you have a friend who spends all his free time with his eyes glued to the web, he or she is likely doing a few things there. Maybe chatting on Twitter or Reddit or Facebook with kindred souls, re-posting every possible GIF to Tumblr, or blogging about cats. Or maybe just browsing--bouncing from meme to meme, weird corner of the internet to weird corner of the internet. It's somewhere between therapeutic and physically harmful, which is why it's so addictive.