Because they liked each other.
Neither, it's diarrhea. Before you could think about it or even turn the lights on, you've already shat yourself.
Prism (Note: I made this joke up. Sorry if this little note refracts from the humour.)
Katie Keurig. (I know the setup might need some work but I just like the punchline I made up.)
An Alley-Gator