Once you can casually ask, ‘Who’s going to be the DD on Friday?’ it’s easy to see how this behaviour becomes much easier to adopt, and it’s also much easier for the sober person to defend their sobriety when anyone offers them a drink. In Belgium and the Netherlands, he (or she) simply explains I can’t drink tonight, I’m Bob’ – a Dutch acronym* for Bewust Onbeschonken Bestuurder or ‘deliberately sober driver’. In both cases, creating a name for a behaviour implicitly creates a norm for it.
