Craig Tucker did not need much to be happy. All he really needed was his guinea pig, his Red Racer, and his Tweek.
He always had a strange attachment to his pets. Stripe, his first guinea pig, had meant the world to him at age eight. He took care of him meticulously and lovingly, never neglecting the animal like some boys his age were known to do. When Stripe died, he cried, probably the most he had ever cried in his young life. He was thirteen then. He pretty much felt like a huge pussy, but that never stopped the tears from coming. He buried Stripe in his backyard, holding a funeral for the guinea pig like he was a close family member. Which he was, at least to Craig.
Two months later, on his birthday, his parents bought him a new guinea pig. He named it Stripe the II, naturally, and treated him in just the same way he had treated Stripe. His guinea pigs, past and present, made Craig happy and nothing could change that.
It might seem a little silly that a juvenile television show like Red Racer could make a seventeen year old happy, but Craig really didn't give a fuck. Red Racer was one of the constants in his life. It was still his favorite after all these years. He had seen every episode multiple times, and could probably recite them back to you if he wanted. He watched Red Racer when he was sad, when he was pissed, when he was happy, and when he was feeling absolutely nothing. It fit to any mood he might have. Watching Red Racer made Craig happy and nothing could change that.
But as important as his guinea pigs and Red Racer were to him, there was still someone that could make him happiest, over anything else. Tweek Tweak had come into his life in third grade. They beat the shit out of each other and ended up in the hospital, but somehow a friendship bloomed out of that experience. The older Craig got, the more he found himself gravitating to the blonde, who had claimed the title of "Best Friend" in Craig's life. Craig and Tweek knew everything about each other, all the important and unimportant things that standard "bffs" know. There were things Tweek knew that not even Clyde or Token knew. And sometimes, Craig would feel bad that he was keeping secrets from his two other closest friends, but at that point, Tweek was more than a close friend. He was even more than a best friend. He was like his other half. Craig put up with Tweek's twitchy nature and incessant rambling like Tweek put up with Craig's "fuck-the-world" attitude and tendency to act like a complete dick. They were polar opposites. But they were meant for each other. So when Craig and Tweek are lying in Craig's bed, wrapped up in each other, Craig doesn't even know Stripe or Red Racer even exist. Tweek makes him happy, more so than anything, and nothing could change that.