Why did Anubis kiss Seth?

Anubis Encounters Seth

In the desert, Anubis makes his way to Seth, who is taken by surprise and delighted when he removes Anubis's headdress. Seth's astonishment grows as he recognizes Anubis in his divine form. Meanwhile, Anubis is left bewildered and reflects on their dialogue, contemplating whether they shared a romantic bond in the past.