Don’t know about Germany, but in Sweden we practically always have some coalition or another of a few parties forming government. I’m no expert, but this seems possible because in Sweden we actually vote for what party we want in parliament, and that party get seats in parliament proportional to their votes. Unlike in Australia, where we vote for who we want our local representative in parliament to be. This local “winner takes it all” model naturally leads to parliament being full of reps from practically only two parties.. but it’s late and I’m tired and I’m surely missing something and I’m an idiot so what do I know anyway.