Why the cat, the camel and the giraffe? It is, so far, a mystery. (The Romans, by the way, called giraffes "camel-leopards" — camels that walk or at least look like leopards.) And, alas, we can't ask them easily.
If something about Hotmail does not work right and the reason is just as mysterious, you're in a better position: you can ask; easily:
›› Can't log in to your Windows Live Hotmail or Hotmail account? Plagued by a glitch that prevents you from composing messages? Here's how to contact Windows Live Hotmail tech support for help.