It's great to watch and even greater to be able to do ;D, but it's something that pretty much anyone can be trained in.
I truly believe that anyone can be trained to do that. The first time I ever sucked cock, a dick half that size would have made me gag.
My first black taught me that giving mouth had to be better than that for him and, while I fully admit that the training was real messy at first, I learned that swallowing a foot long cock and still being able to lick at his nuts wasn't just a good thing, it was essential to pleasuring my black.
Not pleasuring my black wasn't an option, so I learned to open my throat.
Try it girls.....you really can all do it. Just work through the discomfort the first few times