I watched a youtube video recently, in which the author claims that syphilis was a major impact on everyday moral standards.
TL;DR: Are there any widely accepted works supporting the claim that syphilis' epidemic provoked a major shift in European morals from 1960-s Sexual revolution style freedom before syphilis and to strict Puritan style moral code after?
Specifically, in the video it's claimed that sexual life was a lot more frivolous before the first European epidemic of syphilis circa 1495. And only the outbreak of syphilis made everyday sexual life like it's usually imagined for those ages: with strict taboos on adultery and plain clothing style.
He goes to provide some evidences of such frivolous sexual life.
First goes the art of School of Fontainebleau. Its paintings prove, author claims, that sexual taboos weren't strict at all.
Second is the fact that one of the most prestigious orders in England is the Order of the Garter. Author claims that it's name and the fact that it's named after the garter of Countess of Salisbury is a direct evidence of how free sexual life in the Middle ages, before the first outbreak of syphilis.
As for the evidences for the rise of moral strictness after the syphilis epidemic, author claims that this outbreak provoked doubts in the Catholic church, and these doubts made the advent of Protestantism possible. And the reason why rise of Protestantism supports his views is the Protestant ethics.
After such a long intro the question is this. Are there any widely accepted works supporting the claim that syphilis' epidemic provoked a major shift in European morals from 1960-s Sexual revolution style freedom before syphilis and to strict Puritan style moral code after?