Actually, it is the teenager who is untaught in and ignorant of the truth about the facts of life! Parents should never feel intimidated by the ignorance and naïveté of their teenagers. Concepts about dating begin in the home where proper or improper attitudes are programmed into a teenager's mind. Dating practices reflect a way of life, and the results of choosing a mate for marriage may be positive or negative depending on the way of life by which we live.
While the term dating has many meanings, the most common refers to a trial period in which two people explore whether to take the relationship further towards a more permanent relationship; in this sense, dating refers to the time when people are physically together in public as opposed to the earlier time period in which people are arranging the date, perhaps by corresponding by email or text or phone. Another meaning of the term dating is to describe a stage in a person's life when he or she is actively pursuing romantic relationships with different people. If two unmarried celebrities are seen in public together, they are often described as "dating" which means they were seen in public together, and it is not clear whether they are merely friends, exploring a more intimate relationship, or are romantically involved. A related sense of the term is when two people have been out in public only a few times but have not yet committed to a relationship; in this sense, dating describes an initial trial period and can be contrasted with "being in a committed relationship".
I remember when I was a teenager that guys in high school would talk about going out on Friday and Saturday nights "trolling." By trolling, they meant driving down the street angling for a catch with a hook, lure, and line drawn through the water to catch some nice looking fish. The trolling was figurative, of course, and a fish was a girl. This was the idea of some boys on how to get a date. Other terms have been used for the same thing, such as "cruising." Apparently cruising is still used today. They are looking for easy, loose women to "hook up" with for sex, like animals.
Dating as an institution is a relatively recent phenomenon which has mainly emerged in the last few centuries. From the standpoint of anthropology and sociology, dating is linked with other institutions such as marriage and the family which have also been changing rapidly and which have been subject to many forces, including advances in technology and medicine. As humans societies have evolved from hunter-gatherers into civilized societies, there have been substantial changes in relations between people, with perhaps one of a few remaining biological constants being that both adult women and men must have sexual intercourse for human procreation to happen.