How to say yes sir/yes daddy?

So I have a Russian speaking BF. I'm submissive and slightly maso, he says he respects women too much but to my delight he's easing into being rough with me. I want to help him out by expressing my submission. So how would you say in the bedroom setting - yes sir/daddy? I guess the daddy word doesn't probably work outside of English in bedroom - it would probably be too freaky (like on the not very appealing side)? Any other suggestions on what to say to express submission are welcome. Feel free to get creative! All from mild, up to the "I'm yours to use/violate" sides of the spectrum. Please include the translation as well. Help a slutty girl out! If not for me then for the future generations to come. Thanks ;)