Lill3ism
As we all know, Cartman is a huge Creek shipper, so when he finds out about fanart and fanfiction online he is ecstatic. Only now he is exposed to the shipping world of South Park, which he finds to have shipping art of other people together, including him. At first pissed, he comes to realize he could use this to his own benefit.
--Though this idea is a joke that I randomly came up with, its a legimate story. Its just for laughs though, warning for cursing (its South Park what do you expect) enjoy!