Turns out it’s not just the Germans, the rest of the world do it, we are the odd ones out :eek:
https://www.thepoke.co.uk/2019/06/02/turns-british-people-washing-machine-kitchen-rest-world-appalled/
Very common in Germany I believe, as I understand it they find it quite amusing that we get undressed upstairs but carry our clothes downstairs to a different room then take them back up once clean and dry.