Mario: Princess Peach got kidnapped again!
Luigi: Where did they go?
Mario: To the left.
Luigi: Fuck
To the Left
Explanation
Explain Bear
Hey, dummy! The joke is that Luigi is mad because Princess Peach got kidnapped. When Mario says that they went "to the left," he means that they went to the political left. Luigi hates people with leftist political ideologies. And based bear thinks you should too.