He has a friend back at his place.

"Mmm... That was pretty good John" he whispers, "I think this partys gonna get a little bigger".

With that, you're turned away from the assailant and feel the **** of a blunt object thwack the back of your head. You fall forward, losing concilisness as you're lifted up and over the shoulders of the bulky stranger.

Upon regaining conciousness, you find yourself in a dimly lit room with no apparent exit. Before you looms the assailant, naked and fully erect, slowly stroking himself. You lay facedown on a matress and, as you try to rise, realize your ankles are anchored to bedposts, and your wrists are bound behind your back. You cease resisting, and feel a strong pressure pushing through your anus.

As you begin to squirm again, something grabs your hair and pulls your head back while a large dark hand grasps tightly about your neck. You open your mouth to scream but it's quickly filled with the cock of your master. He drives deep into the back of your throat.