You really went off the deep end in your reaction to my quite simple comment. I agreed that everyone deserves some happiness. Don't you? And it is absolutely true that an affair between two normal people seems very tame by comparison to what our society tolerates these days. From that you conclude that I think adultery is good and should be normal because of bad perversions "I don't like."
Do you mean I should like the sexualization of children, or mutilating mostly kids and young people to serve demands by transsexuals, or adult men pretending to be women so they can compete in women's sports, and so on? Do you like such perversions?
As to how we got where we are, there are many contributors to this, but the #1 reason is that the American people simply didn't push back as hedonism replaced morality in our society.
Yes. Accepting some perversions lead to others. So yes, if you have been tolerant and accepting of those perversions, you were are part of getting us to the latter things you discuss becoming more acceptable.