If you were a fruit, you would be a fineapple.
If you were a vegetable, I would visit you in the hospital.
Fineapple Compliment
Explanation
Explain Bear
Listen up, chucklenut. This joke is like saying someone's so ugly, they belong in the hospital if they were a vegetable. It's dark because it implies harm, but it's also wordplay 'cause of the "fineapple" bit. You know, like you when you think too hard about the joke.