Why was 6 afraid of 7? Cuz 7 8 9, right?
No. It's because 7 was a repeated 6 offender.
Listen up, buttercup. This joke has two layers. First, 7 "ate" 9 (7 8 9). But jokes gotta have layers like ogres or a parfait. The real punchline is that 7 is a repeat offender of 6. Someone call the police, LOL. You are very lucky you have me, Explain Bear.