Germans Must Eat Exactly One Warm Meal Per Day

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I am not sure what would happen to a German if they mistakenly eat two heated meals in one day, but I am sure it would be devastation, because all Germans make sure that they eat exactly one warm meal each 

In fact, if you eat with your colleagues at work in the cafeteria, you can tell which ones are married, because they will grab a salad and a roll, then remind you that they have a wife at home who will cook warmes for them later. Even if the cafeteria is serving their favorite heated dish, he must consider that his wife will cook later, and he cannot break the cardinal rule of never, ever, under any circumstances, eating two meals above room temperature in one calendar day.