Shark VS Bear

I don't know if you've ever had a completely meaningless conversation with your spouse that eventually takes on a great deal of emotional value for both of you, purely because you've been discussing it, back and forth, for so long.

What am I saying? Of course you have -- you're married (assuming you have a spouse to have had this hypothetical conversation with, anyways).

Britney and I have a long-running conversation, about which animal is misunderstood, and which animal the world is/should be terrified of. I claim sharks: they're so badass they've never had to evolve, are constantly eating ANYTHING, never sleep, and can appear at a moment's notice out of the dark. Britney, on the other hand, claims bears: you're actually LIKELY to come into contact with one, are smart enough to open doors (clever girl), and are thoroughly uncivilized.

I admit, if I came face to face with a bear, I'd probably piss myself. Then again, that's my point. With a bear, you may come face-to-face with one, have the opportunity to piss yourself, and get out alive to never ever tell anyone the tale of pissing yourself in front of a bear. With a shark, I'm pretty sure that's game over. With luck, a week later, your severed foot will wash up on a beach somewhere to get found by a 4 year old, which will lead to people knowing you are dead.

Britney tried to prove her point to me by making me watch a movie called "The Edge", featuring Anthony Hopkins and Alec Baldwin. (Long story short, they're injured, trapped in Alaskan wilderness, being hunted by a big angry bear). I'll admit, I jumped more than once... but I wasn't left feeling any more afraid of bears. I jumped more while watching Jaws, though the production value of "The Edge" was very nice, as was the actor team-up.

So, reader question: what is the longest running hypothetical argument you've ever had with your spouse/significant other?