Why does he have to choose?

Arslan's gaze swept back and forth between three girls. Finally, he said: "I can't choose. Can I have all three of them?"

Narsus was taken aback for a moment, but quickly said: "Sure, Your Majesty."

Then he said to three maids:

"Juliette, Natasha, Aafreen, from now on you are the personal maid of His Majesty Arslan. You will take care of his every need. Understand?"

All the girls bowed.

"Yes, sir."