”For Archival Use Only” would also look good on a collar. I’m thinking either Jongertrude (would Gertrude get him that collar? Maybe. Would Elias give her a collar that said That and then advise her to give it to Jon? Also Maybe.) or Jonelias with Elias wearing it during the apocalypse. He may get to command Jon and breed him and play pretend at owning him but he IS for Archival Use. To provide a nice hard cock for Jon to fuck himself on and to take care of him through his pregnancies and. Well. Jon is very very possessive <3