Cause you look like a prime mate.
Explanation: This joke is a playful pickup line that combines the word “primate,” which refers to a group of mammals that includes gorillas, with “prime mate,” sounding like “prime mate.” The punchline humorously implies that the person being addressed is attractive, suggesting a connection to the gorilla’s rugged appeal. The humor arises from the clever wordplay and the unexpected compliment, blending zoological terms with flirtation for a lighthearted effect.