Why is one followed by two jokes?

Dear Lao Wang:

Yesterday, your eyes were as big as two cakes, but today they are closed in half. I wonder what the wind is in the southeast and northwest. Although you want to have green hair all your life, your home is still like a whiteboard. Your Ma You is here today. That makes no difference. Your wife said that you went, which is four for your family, but we are short of one person, so it is only three yuan. Tomorrow, when you get to the crematorium, you will really wait for the moment you have been dreaming of for a long time-burning! !