#531 - Redundant Postscripts
It's fun to post-script spoken conversation! Usually we use it as a conclusionary statement, so you know the conversation is over. "... and then I came home. P.S.: You're weird." It's also a good way to shift a conversation abruptly. "... and on top of that, the shop gave me a surcharge just to reschedule! P.S. I got strawberries for you in the fridge."
Sometimes, as in this comic, we post-script things that weren't conversations at all!