Have a look the following 2010 graph produced by the University of Delaware on their college students:
The key aspects to realise from this graph are that the girls who don’t drink basically don’t have (unprotected) sex, and that, more surprisingly, the boys who don’t drink don’t have (unprotected) sex.
This graph concurs with a general thought on Anglo-Saxon culture, which is that the repressive attitudes towards sex within a culture of quite high female empowerment finds a ‘safety valve’ in binge drinking. Basically, young Anglo-Saxons need to get hammered in order to get laid. And, apparently, the need for an alcohol excuse is mutual. This might also explain why you see so much less of this binge drinking amongst men after the age of 30 or so: the alcohol then takes away the performance, so the real point of the drinking disappears.
This dynamic also has real and serious knock-on effects, if you will pardon the pun. It might go some way to explaining why teenage pregnancy rates are so unusually high in Anglo-Saxon countries compared to rich European or Asian countries: once sober, the shame kicks in again and prevents the girls from getting a morning-after pill.