secret　love

I mean that it deviated from outside, the way of the person from an ethic, but in late years the immorality is originally used in the meaning of against man and woman relations in particular by a marriage system.

A man with the spouse and a woman love the opposite sex except the spouse, and the immorality says that I have sex (a man without the spouse and a woman love the opposite sex whom a spouse is and include it when I have sex). Is old; such as adultery, the illicit sex secret communication. (called a flirtation by the expression that I broke into.) These words are used with the single lover;).

It is called a TV drama of TBS the opportunity when (1983) let a meaning called "the illicit sex secret communication between men and women" do a change (fixation) of words called "the immorality" to "wives on Friday"[Who is it?] . I "stagger by the TV drama before it, and words called the (a woman with the husband mainly sends a heart to the man of another person) were generally used, but it is almost it in a dead language after "the money wife (in addition, as for staggering", the best seller novel which Yukio Mishima announced in 1957 comes from a wobble of the virtue").

For etymology, it is an original use that do how to use to "be the / immorality that is immorality" as the stem of a word of the adjectival noun (for a use except the noun), and there did not need to be the thing used in the form to "do immorality" as the stem of a word of change words. In other words "immorality" is speech to express a state / a state conventionally, and it may be said that it was not words to express an act / movement. However, words to "do immorality" as an opportunity are wide in the world, and it comes to be used the area to wives of Friday mentioned above, and it is it till it appears in some dictionaries now.