HBO Go is the site HBO uses to let you watch their shows online. In order to access the videos, you need a username and password that prove you're a paying customer.
But pretty much everyone knows that you can share usernames and passwords in order to get to those sweet "Girls" episodes. If you know someone with HBO, you're as good as in.
Well it turns out this sharing thing is a lot more involved than you'd think.
College Humor got to the bottom of it.