It's all to do with personal preferences, darling. No offense towards you or Sebas-chan. He's just not my type; I don't find him attractive whatsoever. He just seems rather . . . plain, in my opinion. He's a demon, and everything, and yes, he loves cats, while any man you find often prefers dogs, but there's nothing surprising about him, in my mind. If he does something, he's going to do it perfectly, he doesn't seem to have any quirks, he is amusing, and I'll give him that, but he's just very ...one dimensional. He's a demon, in the most literal sense of that, getting tangled into such a web is disastrous. He'd only want your soul, and my soul is, quite rightfully, mine; I am not going to give it away. It's going to be kept safe. It's also possible that I'll fall for his fake charm, as I've fallen for such falsehoods before.
It's a vitamin called k. I just used the technical term in an attempt at sarcastic, ironic and witty humor. It doesn't help much though when the person you're speaking to doesn't get the joke. It's fine, though.