You look at his lips, ruby red with the lipstick, you rub the dildo back and forth across them. "Open!" you say, the commanding tones of your voice will not be disobeyed. He opens.

You plunge deep into his throat, warning him about his teeth, watching his eyes as he sucks.

Using his mouth this way creates a special intimacy, a special kind of surrender and submission for a male slave. He knows this is practice and training for when he will be required to service your male friends

And yes, he swallows whatever you deliver. He is your slave after all; he has no choice.