You should never, under any circumstances, allow Sokka access to the internets. ever. There is a reason for this.
The past day's retching had subsided (after looking at pictures of kittens, which is actually quite theraputic), but Toph had not yet returned. She was very busy shoving some guy out a window. His defenetration was duly deserved. The guy had made some remarks that were quite uncalled for... and the end result would probably scar him for life.
Toph was very good at scarring people for life.
But whether or not the perpetrator ended up babbling in a straight jacket is not what was most concerning to the world. Sokka had internet access. And Sokka was determined to use this to his own evil devices.
"alright, little... magic picture thingy. You're going to tell me what I want to hear, and nobody gets hurt." Sokka jabbed his finger into the screen to illustrate his point. Needless to say, it didn't work.
Many technology induced headaches later, Sokka was on the internet. More specifically, the very fanfiction forum you are reading now. "Let's get cracking!" Sokka entered Katara as the main character and went to work.
Soon the paper next to him was covered in words. Katara and Aang, Katara and Zuko, Katara and Iroh (what?), Katara and Jet... the list went on and on. All of these people had one thing in common. They had all been paired with Katara. Sokka was deeply disturbed, the list being extremely extensive. It included almost every male (and some female) human being he had met! Something had to be done. And if anyone was to it, Sokka was the one.