Then I met you.
So now you know: that's what it's been about the whole time. Every kitten, puppy, and small child I showed you was geared just so, all of it designed to overload you with cute. Soon, the introduced cute will meet up with your native cute, and they will metastasize.
It will begin, then, which is to say, it will end. The world, that is. They worried about fire and they worried about ice, but nobody thought to finger cute.
It'll be like the grey goo scenario, only pink. Or perhaps a light robin's-egg blue.