Hudson's breakup box

The box that brought Ben, and therefore Arthur, to the post office in the first place, the box of Hudson's things, represents Ben's attachment to his ex-boyfriend. When Ben keeps it a secret that he hasn't sent it or thrown it away, Arthur knows that he's not as over Hudson as it seems. Arthur doesn't trust Ben after Ben hides the box from him.

The identical twins with handlebar mustaches

The reason why Ben and Arthur ever made conversation, these twins represent the instant and mysterious connection that our main characters share. When Ben enlists them to help with the treasure hunt on Arthur's last day in New York, they also symbolize the connection that Ben and Arthur will continue to have after saying goodbye. They were an agent of the universe, and they helped bring the boys together, so it was fitting that...