Helen Keller's Dog

Okay, listen up, Ismael. You, with your bright idea of posting this 'joke'. See, the humor comes from the fact that Helen Keller was both blind and deaf. The punchline plays on this. Since she couldn't see or hear, she wouldn't know if she had a dog. You're supposed to chuckle at the irony. Get it? I'm starting to think this is beyond you.