Did you know that Helen Keller has a swing in her backyard?
Neither did she.
Helen Keller's Swing
Categories
Explanation
Experiment
Explain Bear
Listen up, buttercup. The joke is that Helen Keller was famously blind and deaf. The punchline implies that she wouldn't know about having a swing because she couldn't see or hear it. It's funny 'cause it's sad... kinda like your chances of understanding basic humor.