I'm trying to look for this story that I read on here awhile ago. It was a short diaper fic. The most I can remember about it is that the character in it had been an OC and they had been indulging in their favorite pastime while in a cave. At the end of a story a dragon finds the pony, picks him up, and takes them with it. Sorry if this is not enough to go off of, I haven't read this story in awhile and I can't find it.

Edit: If you guys know what story this is I'd appreciate it if you could post the link in the comments.

7516100
https://www.fimfiction.net/story/451151/from-lands-apart-fim-dragon-tales

https://www.fimfiction.net/story/377757/bagpiperix-horror-story