Re the Sweden-US comparison, ther are a few things to consider:
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The number of divorces has been stable around 20000 since the mid 70’s, The total number of married couples is 1.56 million.
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The average age for marriage for the woman in Sweden is 31 years old. It is common for a couple to already have children before they marry.
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Teenage abortion rates are twice as high in the US as in Sweden, teenage pregnancy rates are 5.5 times higher in the US.
There is clearly a delinkage between sex and marriage also for adults in Sweden, where marriage serves as a confirmation of a stable couple rather than as the initial step.
Assuming that Swedish kids are just as stupid and horny as American ones and that participation levels are equal, sex education and the use of contraceptives does serve to minimize the consequences of sex by between half, if you use the abortion rate as an indicator of an unwanted pregnancy, and 80%, if all teenage pregnancies were unwanted.
Given that many Americans do get voluntarily married in their teens and start families, the real number is probably closer to the lower end.
What gives pause for thought is that the US approach of attaching a moral significance to abstinence, rather than a practical, can only be said to have badly backfired. A frightening thought is than many af the pregnancies that went to term in the US resulted from kids hiding their pregnacy from their parents, or worse not even realising it.
TQB