Helen Keller
During the act of fellatio, the male receiving oral sex, without warning, rams his penis into the back of the throat of the giving person just before ejaculation, thus rendering the person speechless. He then pulls his penis out of the person's mouth and ejaculates in their eyes, rendering them blind. Immediately after, while the element of surprise still has the person confused, he boxes their ears, rendering them deaf. At this point, the only thing the person can do is stumble blindly about with their arms in front of them, gurgling unintelligibly, much like Helen Keller.
You'd be a real miracle worker if you can give my sister, Beatrice, the Helen Keller.