Winner
Diverse in Unity
The Americans let people get to college the year they turn 18. This is also the time most of the kids are living away from their families, they get to live in coed dorms, and they've grown up on a culture portraying a college life of freedom, partying and sex.
So, naturally, a lot of them want to try it all when they get there (and who can blame them?). The biggest reason college freshmen in the US drink as much as they do (this goes for boys and girls), is that they need to add some liquid courage before trying to hook up.
Of course, put lots of young, drunk people together, preferably while living in the same building, and with no supervision, and lots of not-so-awesome sex will happen, and some may also have bad experiences. And some will, and do, get raped.
Not a very easy system to untangle afterwards unfortunately...
Also, some feminists in the 70's started spreading the idea that 25% of women will be victims of attempted or actual rape during their 4 years at college. A statistic which, if it was true, would be absolutely extraordinary and call for some pretty extreme reactions. In reality however, the feminists had tried to ask college women if they had experienced rape, and gotten some very disappointing results: Very few women had. So instead they asked new questions about the womens' sex lives, and then used their own judgment to decide if what each woman had experienced was rape or not. Then they got a much better 25%-figure, and could call attention to this problem of rampant college rapes.
This makes a lot of sense, thanks.