Why can't Helen Keller drive?
'Cause she's a woman.
No, really. Why can't she drive?
Because she died.
Helen Keller's Driving Ability
Explanation
Explain Bear
Listen up, numbskull! The joke is that the first answer implies it's because of sexism, but the real reason Helen Keller can't drive is because she's dead! It's funny because it subverts expectations and throws in a dark twist. You probably think a twist is a dance move, you troglodyte.