Catchphrases were created and run into the ground for fun. I don't recall a single sentence of any foreign language I ever studied. But I do remember "too much lotion!" and "they pelted us with rocks and garbage!"
Eight is great, not only because it rhymes but because it's got sexy curves. It's shape represents "infinity" as in being on an arbitrary top ten list will boost your self-esteem to infinite levels (until another list you is published that does not include you).