Straight Edge was never about "not entering into destructive behavior". That is a new, and IMO, rather shallow interpretation of sXe culture.
It has been about rejecting dominant culture, including the "jock" culture where people had casual sex, especially since rape-culture is pretty dominant within teen male culture.
As the decades have passed, straight edge has changed, and this new ideas of purity, or avoiding destructive behaviors, and puritanism have emerged. However, those are always at conflict with what is the norm in sXe culture: tattoos, piercings, going to shows and dancing quite violently, engaging in other "punk" youth behavior that does not include recreational drug use, etc.
Either way, the song "out of step" did NOT define straight edge... the culture existed before the song, and a culture is bigger than one song, or one style, or one location, or one place in time. sXe keeps changing, and it is certainly different than when I was a teen nearly two decades ago.
Regardless, this sex thing has roots that are NOT tied to puritanism, but rather tied to a rejection of the teen culture in punk and dominant culture in the 1980's to create something more meaningful. sXe may have changed, but it still is that at its core: a rejection of dominant punk and dominant pop/adult culture to create something more meaningful.
"The worker has the right to leave his boss, but can she do it? And if she does quit him, is it in order to lead a free life; where she will have no master but herself? No, she leaves to sell herself to another employer. She's driven by the same hunger. Thus the worker's liberty is only a theoretical freedom, lacking any means of realization; an utter falsehood."