Sonic has found out that holding poop is actually pretty hot. The mass in his bowels presses on his prostate, so creates pretty good pleasure.
He started holding it one day. Two days. Three days.
Two weeks have passes.
"Ow... my belly hurts" moaned the hedgehog. In fact, his bowels where like crazy with all the gurgling and churning. Sonic was jerking off.
He had his cock in his hand, while trying to hold onto the pressure.
"Maybe it's time to let go..." he thought. A stinky fart prove him right.
He went to the forest and squatted. He sighted, relaxed, and ohh~
He let out two more farts and started pooping. The crackling started, as his anus stretched. The mass exited his hole little by little, until it fell out in the grass. His bowels churned again and Sonic rubbed his belly. "It still hurts...Oooohhhhh" A pretty bad cramp hit him, and a gush of diarrhea came out.
Chunky pieces fell off during almost five minutes nonstop.
He farted twice, and moaned. Then more diarrhea fell.
"I guess I'm done..."
He got up, wiped with some leaves, and farted once more. He felt so much better.
Sadly, he was going to eat some more, so he could hold and poop more~