Showering problems

After church I went into the bathroom with the prospect of a nice, warm shower. In the shower I found 2 knobs. One, as I soon found, turned the water on and off. The other had a list of numbers on it. I saw that the highest number read 45, which I assumed was the temperature of the water. Unfortunately, I didn´t know that it was Celsius, so I thought that the Germans took really cold showers. I turned the knob to 45, anticipating freezing cold water. As I got in the shower, I was blasted with 113 degree hot water! Quite a surprise.