You are saying that in the USA today, that "having sex only with one's spouse" (ie - your definition of "chastity") is "culturally unacceptable" here?
I'm curious on what you base this on?
I am pretty certain that being unfaithful to your spouse, or even "significant other" is still considerably frowned upon in the U.S...?
That is - I don't think it's "accepted" culturally - just tolerated (by the wider secular U.S. society). Maybe that's what you are getting at...?
I think for the most part our culture would rather those who are married to remain honest with each other, to uphold the vows they took when they were married. There is also another smaller part of our culture (of which I am in agreement with) that would say as long as all parties are aware and consenting to it - ie, open marriages - that is ok as well.
But I don't think our culture here in the U.S. completely condones unfaithfulness...?
Maybe I am wrong? Certainly something to think about; which is also why I ask...
Further, promoting abstinence and chastity while not promoting other options, and especially when combined with the often corresponding anti-choice politics, disproportionately and unfairly impacts the poor and uneducated, particularly the women.
I would go so far as to say it’s cruel to continue to promote abstinence today.
Abstinence is probably even less culturally acceptable than contraception, pretty much universally.
Chastity (i.e. having sex only with one's spouse) is less reliable than abstinence, since one's spouse may cheat, but it's also a very good way to prevent the spread of STDs. But even chastity is often culturally unacceptable, whether for both sexes (as in the U.S. today) or for men (as in many places, both historically & in the present).
It's sad — STDs could be eliminated, but … people make mistakes.