Dougla Sirk (Hans Detlef Sierck, before his “Americanization”) was born in Hamburg, Germany, in 1897. Disagreeing with the third Reich, he moves to United States in 1930. Smart and cultured person, he soon uses colour and “wide” format. He dies in 1987 in Switzerland.
In Douglas Sirk movies, characters usually overact, feelings are exaggerated, but beyond the superficial aspect of his characters, Fassbinder says that “the good, the 'normal' et 'beautiful' people are absolutely disgusting ; the bad, the weak, the strange characters bring compassion”.
We can consider the theatre play with Natalja in Underground to be an homage to Sirk, ans his exaggerated romantic feelings.