What is the origin of the idiom "out of touch" and when to use it?

The idiom "out of touch" likely originated from the physical sense of being in contact or not with a particular object or surface. In this case, "touch" is used metaphorically to represent being in contact with current events, trends, or knowledge. It is used to describe someone who lacks awareness, understanding, or knowledge of current trends, developments, or the prevailing attitudes of society. It suggests that the person is disconnected from what is happening around them, especially in terms of contemporary issues, popular culture, or technological advancements.