@EmilyVan, but respectfully, the conventional values used to be shoved down people's throats because pregnancy followed intimacy. Now that women are able to control their cycles, the attitudes changed. IMO, societal mores merely follow technology, and no one is to be blamed..
As to kids, biology is biology. To remember "the Song of Songs", Shulamith was a 13-year old "young woman". In old times, premarital sex was a sin, but girls and boys would be customarily wed off immediately after puberty, because average lifespan would be 20-25 years. They would become intimate way earlier than we do, so maybe, we are becoming conventional?
KB was 28 when she had a baby, PF, 32. Pretty mature people, it seems.