You hesitate slightly, then answer.
"Dick I guess"
He slam you in the face.
"You ain't good at this yet, uh?. I guess who? "
You wanna get to your feet and fight back, but instead you find yourself saying.
"I guess Master"
He smiles and grabs your hair, starting to fuck face you. By now you're used to taking his dick and it slides in your throat without a problem. Soon enough you can feel him going faster and you know he's gonna cum, but instead of the hot white liquid you were expecting, you find yourself spitting something that slowly goes down on your face. A lot of something. You realize you're now his dick and it's not spit, it's his cum. He quickly dry you off with a towel and stands in front of the mirror. You can see yourself being his dick, still tattooed with the word "Slave".
Your master does a hand gesture, and the word disappear.
"Don't worry", he says, "It's still there, just hidden for now. Now, let's go shall we?"