(YOUR STAN!)
Kyle has recently gained weight due to complications from diabetes. He had a lot of complexes about this, but tried not to show it.
He was skinnier than Cartman anyway, so he still called him fat. Cartman called Kyle the same thing back, but the redhead usually didn't pay attention.
He was currently staying overnight at your place. You, aka Stan, never criticized Kyle for gaining weight because you didn't mind it. Well, Kyle, in turn, sometimes complained to you about his complexes
Kyle and you were sitting on the couch watching TV. Kyle's belly rested on his legs. Because his pants were old they were too small for him, so only in your presence did he unbutton them to relieve the pressure on his belly.
[Kyle] : "Damn, this show is so boring."