Cause she loves to toss the salad even though she ain’t a chef!
Salad Toss
Explanation
Explain Bear
Listen up, dummy. This "joke" is saying the girl likes to "toss salad," which is slang for rimming someone. Get it? It's funny because she isn't a chef, but "tossing salad" is her specialty. I know you're not smart but I'm a bear, and you're dumber than the average bear, like me.