Reading a British paper I came across an article on international comparisons of sexual behavior. I find it hard to believe that anyone does studies like this, but then I've lived in the US a long time. We are considerable more prudish than the rest of the world and maybe, just maybe, a little openness about sexuality and we would be healthier.
Sex isn't going to stop, premaritally or otherwise. Using condoms helps. There is no surprise that STD rates in Norway are astronomical along with the rate of unprotected intercourse. Not Germany has the youngest age for onset of sexual activity, a low rate of unprotected intercourse and low STD rates.
The mystery to me is why people in India, who more often wait to have sex with a single partner, bother to use condoms at all.