darth_ender said:

Sexual frivolity, infidelity, teen pregnancy, abortions, and the like are certainly much more prevalent than before. To what can we attribute this rise? Largely the media portrayal and acceptance of such behavior.

Or does the media portray this behavior because it is already accepted? I don't think the influence of books, movies and TV is that great, simply because most people wouldn't watch a movie or read a book if they are strongly opposed to its topic. The media mainly reflects the behaviour of the society, which is much more formed by social factors.