Because it amuses me...
Chaotic Evil means you get to do whatever you want, as long as it gets you closer to what you really want. The best foe is an unarmed one. The best puppy is a kicked one. The best fellow party members are also Chaotic Evil, going after the same goal as you. Only you'll get to it first, cause you're smarter and more devious. And you put iocane powder in their Mountain Dew. Muhahahahaha.
"Chaotic Evil means never having to say you're sorry"
"Chaotic Evil means never having to say you're sorry"