Question

lo 17 commas for clarity
add or remove commas, if necessary, until the sentence has correct punctuation.
grampa simpson, why did you paint zebra stripes on my face?

Explanation:

The sentence "Grampa Simpson, why did you paint zebra stripes on my face?" already has the correct punctuation. The comma after "Grampa Simpson" is used to set off the name when addressing someone directly, which is the appropriate use of a comma in this context. So, no changes are needed.

Answer:

The sentence "Grampa Simpson, why did you paint zebra stripes on my face?" has correct punctuation as is. No commas need to be added or removed.