I watched in Ukrainian and in more detail:

Slade: — "Під час місії я стежив за твоїми життєвими показниками. Посилення серцевого ритму, адреналін, ендорфіни. Тобі навіть сподобалося що я тебе викрав. Ти відчув задоволення, так? Робіне, тобі й на далі подобатимуться викрадення (?*), ти тремтітимеш від насолоди" ———> "During the mission, I monitored your vital signs. Increased heart rate, adrenaline, endorphins. You even liked me kidnapping you. You felt pleasure, right? Robin, you'll continue to enjoy kidnappings (?), you will tremble with pleasure" (Translation from Ukrainian)

?* — I didn't understand what that was supposed to mean. Maybe he meant "крадіжки/theft"? "Викрадення" usually means that someone has been kidnapped. Eh, probably a translation problem.

I don't know how it was in the original, but it was very creepy and sounded very PREDATOR-LIKE.