Nobody knew the exact time people began worshiping The Arseless. However, according to the notes, diaries and books written by Maester Shredder, this can be traced back to the Warring States Period in Godville, the land of heroes.
In the era of biological and magical warfare, there had been some disturbing news reported across the realm about strange affliction on newborn infants. Every day, more and more babies are born without anus. This resulted in children and grownups who survived their horrible lives spending their days spouting shit, literally and figuratively. They who unfortunate enough to be born without anus oftentimes ended up channeling their hatred towards the environment. Resulted in the famous name-calling "assholes without asshole".
Years after first report on the foul mutation. There were some report from