Content-Type: text/shitpost

Subject: Physics puzzle
Path: you!your-host!wintermute!wikipedia!uunet!batcomputer!plovergw!shitpost!mjd
Date: 2022-02-23T20:02:38
Newsgroup: rec.pets.preheat
Message-ID: <f195ae5ba268ea34@shitpost.plover.com>
Content-Type: text/shitpost

If the laws of physics are time-symmetric, why do I always have to preheat the oven, and never postheat it?