Why does my lemon taste like blueberries?

Why does my lemon taste like blueberries? was a famous political advertisement and slogan used by the Social Labour Party of Delamaria against the liberal Prime Minister of Delamaria Stephen Milbank. The liberal party traditionally has been represented by the colour yellow, while the United party was traditionally blue .Milbank's reforms to liberal policy pulled the liberals closer to the politics of the United Party, therefore leading to the phrase, why does my lemon taste like blueberries.

The poster used in the 1994 elections.