White girls who truly understand their place always suck dick naked. Doesn't matter if that is the only thing you are doing, your cloths come off regardless of whatever hole is being used.
I see your point, but I still say she should swallow. I had a friend over once. The guy had a 9 incher. The wife sucked him off. He would cum buckets. She made a mess and got it everywhere. I put her in his lap and spanked her. Our job is to make the cum, and her job to consume it. Don't waste the cum!