Use them on him!

He turns around, looking a bit curious.
"What´s your name?"

"Marcus."

"Marcus, care to spend the night here?"

Marcus licks his lips nervously put you grab a collar you took from one of the boxes and strap it around his neck. His demeanour turns meek.
"Sure, Master."

"It´s Sir!"

You smack his ass, making him stiff as a stick. As you close the front door he undresses until he´s nude. You see his well defined muscles and his shaven body. You look down at his cock, its about 7,5" long and semi-erect. Even his balls are clean shaven.

Now then, what to make him wear?