What is something that was normal in mediaval times, but would be weird today?

Outlawry, which stripped a person of all legal rights and allowed anyone to kill them with impunity

Throwing your shit out of the window

You have insulted my honor , I challenge you to a duel !

The Royal Ass Wiper.

Seriously. Someone would wipe the king’s ass. And it was a respected position.

Animal Courts. By far the most serial offenders were pigs, accused and convicted of chewing off body parts and even eating children. Most were found guilty and sentenced to death by hanging or being burned at the stake. In 1386, a convicted pig was dressed in a waistcoat, gloves, drawers and a human mask for its execution.