Dating as an institution is a relatively recent phenomenon which has mainly emerged in the last few centuries.
A few centuries ago, dating was sometimes described as a "courtship ritual where young women entertained gentleman callers, usually in the home, under the watchful eye of a chaperone," but increasingly, in many Western countries, it became a self-initiated activity with two young people going out as a couple in public together.
These people will have dates on a regular basis, and they may or may not be having sexual relations.
This period of courtship is sometimes seen as a precursor to engagement or marriage.
Behavior patterns are generally unwritten and constantly changing.
There are considerable differences between social and personal values.