Marx used to be a heavy smoker and never left his mouth. On one occasion, he once said to Lafarge: "The manuscript fee of Das Kapital is not even enough to pay for the cigars I smoked while writing." He smokes as fast and fiercely as anything else, so he always chooses cheaper cigars to buy. When he smokes, he even chews half of it in his mouth, saying that it can improve the smoking effect, or double the enjoyment.

Later, Marx discovered a cheaper cigarette. A one-pound box was about one and a half shillings cheaper. So he used his savings ability in political economy to explain his theory to friends around him. He said that he saved a shilling and a half for every box of cigarettes he smoked, so the more he smoked, the more he saved. If he can smoke a pack of cigarettes a day, he can spend the day with the "saved money" if necessary. For this "frugality", he consumed great energy and made sacrifices. A few months later, the family doctor had to take action and strictly forbade him to "get rich" by this "saving money" method.

188 1 The deaths of Marx's wife Yan Ni and his eldest daughter Yan Ni Jr. in 1883 gave Marx two fatal blows, which made him unable to recover from years of excessive fatigue. In the mid-1970s, doctors banned Marx from smoking. For Marx, quitting smoking is a great sacrifice. When his comrade-in-arms leissner visited him for the first time after he quit smoking, he told leissner happily and proudly that he had not smoked for several days, and he would never smoke again as long as the doctor didn't allow him. After that, every time leissner went to see him, he always told leissner how long he had given up smoking, and during this time, he didn't smoke once. Even Marx himself doesn't seem to believe that he is addicted to cigarettes and can give it up.