intoxicatedto the point of impossibly blurred vision, incomprehensible slurred speech, and an inability to hear anything over the sound of the blood pounding in your ears
The level of drunkenness one reaches when he/she is blacked out and is no longer able to pronunciate words in any sort of fashion. In other words the persons are blind / deaf / dumb.
When the sex is so good, they're left incapacitated. Inability to walk, talk, hear, see, or even think clearly, at least temporarily. To be Hellen Keller'ed is to be in a state of euphoria.
M: OMG, J totally Helen Keller'ed me this morning! It took an additionaltwo hours to get out of bed this morning, had to watch a movie to recover before brekky!
When you are getting head, and pull your dick out and cum in the girls eyes. While you're doing this you clap you're hands over her ears (ya know hard enough so she cannot hear for a little bit). Now she can't see or hear, just like Hellen Keller!