What does jargon mean, seven questions eight, eight questions seven?

There are many "jargon" in the "Jiangxiang School" to refer to a specific person and thing, so as not to make ordinary people too clear.

"Yao Ying Fu" said: "Eight questions and seven questions, those who like it want to be expensive, and those who complain are really worried; Seven questions and eight questions, if it weren't for eight things, it would be difficult for children to rest. 」

If there is no teacher to teach here, it is difficult to understand the meaning of "July 8" referring to husband and wife.