The ancients said the number of times they slept together: one looked, two slept, three counted money, four burned incense, and what was behind five?

A watch, 18, a watch for two hours, once every two hours; Twenty years old, once a day; More than 30 years old, counting money every five days; In his forties, he burns incense twice a month on the fifteenth day of the first month; Over 50 years old, once a month, once a month; More than 60 years old, changing clothes in four seasons, once a quarter; More than seventy years old, such as Chinese New Year, once a year; Eighty years, only memories are left.