@Mr. Deez Traveling through Frankfurt airport on way to Delhi and the airport is not hotter than hell (despite being cold outside, near 0 C). Normally it’s hot inside as you know. In fact, it’s actually cool and refreshing. I can only conclude that Germany has cut back the heat to the airport for this to occur. Hopefully this changes long term behavior.
Glad to hear that. Germans are weird about heat. One of them once explained to me that they think being cold and dry creates a major risk of illness. Of course, we know that being cold can make you more susceptible to getting sick, but they're borderline superstitious about it. That's why they largely avoid air conditioning (in addition to the costs).
So in the winter, they crank the heat way up. They'd rather make every room hot and stuffy until everybody's sweating bullets. If you stay at a German BnB, your host is always asking if you're warm enough. If you're used to AC and cool temperatures indoors, it's brutal.
And if you have kids, they're insane. When Deez, Jr. was a baby, I once got bitched out by a German woman because she thought I didn't dress him warmly enough. When he got older and thought he shouldn't wear a coat, he'd say, "Daddy, why do I have to wear a coat? It's not that cold." I'd say, "I know. It's because of society."