I’m not sure those things were political , certainly nobody campaigned on a platform of masturbatory freedom. As for porn,it was a social movement that used the interpretation of the First Amendment by the courts to advantage. Whether it would have gotten 50% + 1 in an election anywhere, I don’t know, especially in the era that the victory was won as opposed to today. Maybe as an appeal to the First amendment, but not likely on its own. “ You can’t legislate morality” is a phrase older than any of that.
They certainly promoted a platform of porn freedom, called it a First Amendment issue; that's the same as a pro-masturbation platform, since porn is the paraphernalia of masturbation. They campaigned for it, just as figures like Anthony Comstock campaigned against it.
As I remember, when Playboy was celebrating its 50th anniversary, about 10 years ago, one of their editors came out with a book which was a triumphal and revealing history of the Sexual Revolution. I am sorry I can't remember the name of the editor, or the exact name of the book. Anyway, it shows the aggressive leveraging of all branches of government (legislative, judicial, executive) as well as the use of clever and pervasive propaganda, to camapign for the forms of vice which have now become so ubiquitous as to be unremarkable.
All this straight Sexual Revolution campaigning --- especially, via contraception, the mainstreaming of intentionally deconstructed, denatured sexuality --- simply paved the way for the present overwhelming gay legal and social triumph.