AITA: My boyfriend places sheets on all of the furniture when I'm on my period

ESH - your communications need to improve. Taking an action that will cause drama is not a way to resolve this issue.
He will never tolerate children, so I hope you plan on remaining child-free with no pets.

Do you have leaks/accidents? If yes, then I would find a compromise, such as adding a decorative cover for the couches that can be washed if they get soiled. Add a second layer of old bed sheets so if they get soiled, they can come off easy and the clean sheets are under them.
If you don't, then he's over reacting and needs to work on giving up "perfection". The world is messy, and he will always be disappointed if he expects everything to remain clean.

/r/AmItheAsshole Thread