...because they're drunk

Ok so the plane lands in Frankfurt and people applaud. Obviously a german custom I was unaware of. Like "congrats! You didn't kill us, good job." But then I realized that they were probably applauding because they were all drunk. Lufthansa happens to be one big open bar. The men across the row during the duration of the flight had three beers, a glass of wine and a glass of cognac each. All for free. Because that's how important drinking is to the Germans, nothing like an eight hour flight to get a party started.