Any lady who likes to give a sloppy hands free BJ, to black guys or other men, is a champ. Don't be scared to ruin the front of your shirt with tons of spit and drool if you are still clothed. Suck that cock wild honey! We men adore women with skills and passion like that. Favors of pleasure are returned in kind, as always too.
Some women are more skilled and enthusiastic at dick gobbling then others. HINT: If the man turns her on and gets her wet due to the chemistry between them her cock loving skills orally seem to magically improve to new heights.
If is is her favorite rock star she has a chance to suck off, she will turn into a porn queen and vacuum away. With a limp hubby were sex between them is routine and stale, bad or no BJs are the norm.
There is no wrong way to get your cock sucked by a woman however. Hands where she wants them and all.
Still, as NWA said:
"It don't matter, just don't bite it!"