Start dening him any type of sex for a few weeks. When lover is prresent order him to suck. If he refuses tell him you will let him have his release of his sexual frusrtration. Usually he will drop and suck. While he sucks play with his patetic cock and he will come while sucking.
After wards tell him “that was not so hard! Was that no nice getting off and releasing your sexual frustration. If you get in habit of sucking dick you will be sexual satisfied.”
He will be reluctant till you forbid any sexual activities till next time. Repeat this as many times as necessary till his mind ties cumming with sucking. And if you have him suck black cock all the time he willperfer black cock.
While sucking tell him he is a good girl. As time goes have lover say he is by far the best fagot that has ever sucked my dick.