If you think "Jumping into bed" and having sex before marriage are an illness of American culture, you should go to Europe.
The US is notoriously prudish when it comes to sex, compared to other nations. If anything, we are starting to catch up to Europe.
In Scandinavia, I hear it is fairly normal to have sex THEN decide if you want to date. And then even then, I hear couples often just don't get married. They live together, have kids, grow old, and then as a 20th anniversery celebration or something, they might perform the ceremony.
And let's not forget that in Northern Europe, guys aren't expected to pay for dates, take girls on extravagant dates, and make all the first moves. Girls approach basically as often as guys (I've heard Swedish girls complain that they ave to get Swedish guys drunk to get them to talk), dates are usually something like fika, which basically getting together for coffee. And you almost always pay for themselves. (Hence the phrase "Going Dutch").
Dating in the richest, most gender-egalitarian societies like these would probably make many American girls' heads explode. The American tradition for dating is where the woman plays a mostly passive role, while the guy initiates everything, pays for everything, and otherwise does all the wooing without expecting to be pursued in any way.
In THESE countries, such a method would be seen as unfair to the guy, demeaning to the girl, and intimidating to spend so much money and effort towards someone you haven't even really gotten to know.
Europe has a lot more sex in the US, and they are much more open about it. Sex education is compulsory and starts when they are really young, being taught things that would make us gasp in the US, like showing videos we would consider X-Rated, teaching healthy masturbation, and often having government funded contraception initiatives.
In the US, they teach abstinance-only sex, have big taxes on female contraceptiion, are holding up research into male contraceptives, and are so hush-hush about sex that when people go at it, many hadn't even been taught very well what precautions to take and what options they have.
So we have less sex, but more babies.
And worse yet, we censor sex but are nonchalant about violence. A very bad combination.