It is not rubbish... but I accept you do not agree with me. People are allowed to do that.
You say it will not end with single pregnant women being castigated? Really? It was only 15 years or so ago that the Tory party conference where they had "a little list" - single mothers being on there (never single dads... odd that one, I thought).
The truth is we DO have a set of morals in society; it is just that you do not like the current ones we have, because they are different from what YOU prefer, probably what you were brought up with? For example:- when I was younger, drink driving was a bit of a lark, a feature of many sit coms. Now... most people really do not consider drink driving to be in any way acceptable. A change in morally acceptable behaviour.
It does seem that everything you mention (sex in public, fetish gear, porn etc.) is related to sex... Don't forget, what some might see as porn, others may see as a normal part of a film. Someone watching Game of Thrones on a tablet may look like porn, but it is not porn (more like titillation done for ratings).
As I said at the start - you have your view - you are welcome to it, and I have mine. Societies not not stay static, and that lack of stability can be uncomfortable. I treasure how easy going ours is, and would fight against any attempt to police what we do. Considering your comments are all sex related, I would guess (and I do admit this is a guess!!) that you would prefer to have no naked bums/breasts even after the watershed? If you do not mind having that degree of sex on TV, consider those who were brought up in the 50s... the idea of a naked person on TV (even partially naked) would have them complaining about modern morals etc! Which.... brings us right back to Mary Whitehouse and "the moral majority" imposing standards on others.