Because Adolph Hitler was a Doi-doi-doi.
An elephant. Doi doi
Misa Doi is 5' 7".
Takeo Doi was born in 1920.
Takeo Doi died in 2009.
Mika Doi was born in 1956.
Masaki Doi was born in 1960.
Tōru Doi was born in 1958.
Hiroaki Doi was born in 1978.
The population of Choeng Doi is 10,750.
Michiyoshi Doi died in 1975.
Michiyoshi Doi was born in 1926.