As you know, when John F. Kennedy visited Berlin during the Cold War, in his
famous speech he said the German sentence: "Ich bin ein Berliner." ('I am a citizen of Berlin.')
Well, "Berliner" also is the name of a German pastry (similar to a donut) ...
A travel guide about Berlin by Qatar Airways wrote:... you can stop in one of the many street cafes and enjoy delicious pastries, and coffees, or perhaps a donut in homage to ex-US President Kennedy, who, in 1961 in front of a crowd of a half a million people famously said: "Ich bin ein Berliner." ('I am a doughnut').
The German phrase was re-translated by Homer Simpson, I suppose.
Regards, Little John