@WoodenBlaze
I believe that 3 explanations are missing
Biological needs - food, water, toilet.
Discord could have explained this to Shining Armor by giving him Cadence
Royal duties - raising the sun and moon, receiving visitors, royal decrees and orders, etc
Twilight’s relationship with M6
Another would be a short story about how Discord takes 5 of its submissive princesses for a public walk and the fashion for such a relationship begins in Canterlot, and then across the country ))
You are clearly not Rarity or Fluttershy)) Although perhaps Applejack
I dunno, maybe Rain Shine or Queen Novo :p
I think Discord already do that, even if it’s never said in any of the stories :p
There won’t even be a fourth sentence? ))
Stop being so tricky about the details. Beside, it’s Discord, he can do anything :p
I believe that 3 explanations are missing
Discord could have explained this to Shining Armor by giving him Cadence
I leave that to you and your imagination :)
Is it really just to drive on a leash and nothing else?