Why can't two Asians make a white baby? Because two "Wong's" don't make a white.
Two Wongs
Explanation
Explain Bear
Listen up, buttercup. This "joke" plays on the stereotype of Asians having the last name "Wong." The punchline twists the phrase "two wrongs don't make a right" into a racist jab. People like you probably think it's funny because you lack the brain cells to understand why perpetuating stereotypes is harmful and not cool.