The Jewish fast days (tannic, tzorn) which are always penitential are either public, like Yom Kippur; or are a remembrance of
past sad events such as a parent's anniversary of death (yahrzeif) or the assassination of the last Governor of Judah (fast of Gedaliah).
There are also some topics that are not happy but are not too
sad to talk about, for example, to make fun of the experience of strange teachers, the hardships of the college entrance exam, speaking of these
past events can enhance understanding of each other and make the hearts of sugar daddy couples closer together.