when a man is getting a blowjob from a woman and instead of the tradtional "on her knees" style, he is reversed so his nutsack is now on her eyeballs, one nut in place of each eye, so she cannot see, this is because Hellen Keller was blind. Also, he is using his free hands to cover up her ears, this is obviously because she was deaf. Finally as she is becomin acquaintences with his johnson, he makes her say a sequence of words that are incomprehensible because, of course, his shlong is in her mouth, causing her to seem mute. After she has become mute, blind and deaf, you can officially say you have performed The Hellen Keller.
Kevin: Boy, I could sure dish out a good ol' Hellen Keller right about now.
Rodi: Oh Boy! The Hellen Keller? My favorite!
Kevin: Well in that case, let the Hellerin' begin.