Well I think it’s a combination of culture and personal rasons. I moved into a shared flat with two friends when I was 19, had many other shared flats with 2-4 people another 15 years. At your age being together with my partner for 4 years I moved to an own flat for the first time of my life (without my partner). Living with my parents is unthinkable for me, it’s usually enough when I visit for a few days.
German here. It is indeed one user who missed pizza day today at work, posting many pizza memes in a short time.
The German community on Lemmy is rebuilding at the moment as their main server feddit.de was abandoned by its admin. Now the communities are slowly transitioning over to feddit.org. During that process, single users can be largely overrepresented until the communities found a balance.
I am not sure but I think you can disable certain languages somewhere in your user settings, so that German communities should not reach you anymor3.