So a group thinks we are getting too exhibitionist and sexually liberated and tries to repress such activities. Then another group whose members feel they are being more and more constrained, rebel with more outrageous behavior and more flaunting of the "norms." The first group feels that things need to be tightened up even more; the second group reacts by escalating their "in your face" behaviors even further. So it goes. It's not so much the swinging of the pendulum as it is reactions getting more and more extreme. My suggestion? Try really hard to do what is right for yourself. Live as you feel is most appropriate for you, and ignore or tolerate those who feel differently, even if they are obnoxious and vocal. All the while, make sure your own rights do not get abridged as well as theirs.