Dump and Change...But Mostly Dump

"Oh. Uuugh. I don't feel so good. Pat, could you get out that Brown bag? I gotta take a Crosby*."
"Ok. Here you go." Pat unfolded the bag. Claude pulled down his pants and squatted over the bag. Pat felt suddenly aroused when Claude' s arsehole opened slightly, letting out a *poot!*
"Woah. That's one big Crosby°."
Claude grunted and pushed some more. His hole opened once more, this time pouring out a beige waste into the bag. It went in with a *crinkle*.
"Mmmph! *relieved sigh*"
Claude wasn't done just yet.
Pat witnessed the anus let out an even bigger contribution to the pile. Once his mess was up to the middle of the bag, Pat reached to grab it, when Claude peed right into it. Pat now had to carry a soiled, soaked bag right to the park's garbage can. The bottom of the bags' s paper turned from a light brown to a dark brown because of the wetness.
. When it came time to throw it away, Pat heard it land in the empty receptacle south a *thunk!*.

Notes

Short because it was written from a dream.
* "Take a Crosby"-Flyers' slang/definition for taking a dump.

°"Crosby"-Philly slang for "crap", "poo", "sh!t", etc.