Fertility is fun and fixes the problem.
“F*** for the future!”
Well, I don’t want to get too graphic, but want to express this thought.
My wife and I enjoyed sex, and as a result of our love, we had 2 children.
Critical numbers of people nowadays, while they are enjoying sex, they are taking steps to ensure that their love doesn’t result in their having children, or more than a certain number of children.
Birth control, as well as the mindset involved with using birth control, is a key reason for fewer children being born.
There’s something of a mindset involved as well, in which critical numbers of young people don’t “grow up” so to speak. They don’t want to accept responsibility of marriage and family, and live their lives in such a way that they have an “extended adolescence”, instead of wanting to “settle down”, if I can put it in those terms.