has its reasons
Wie Donut gesagt hat, jeder hat seine Gründe.
As Donut said, everyone has their reasons.
— Kung Fu Hustle (2004)
Wer so oft küsst, hat seine Gründe.
Anyone who kisses so often has their reasons.
— Die Besucher (1993)
Jeder hat seine Gründe.
Everyone has their reasons.
Das hat seine Gründe.
There are reasons for that.
— Blau ist eine warme Farbe (2013)
Er hat seine Gründe.
He has his reasons.
— Die Royal Tenenbaums (2001)