"Cat-butt coffee"

Maggie Koerth-Baker, of Boing Boing, gives a critical review of Kopi Luwak, the bean which is given its unique flavour through a process which includes being eaten (and subsequently, you know...) by Asian Palm Civet cats:

There is a difference in flavor. Kopi Luwak is noticeably not bitter. Swallow a sip, and it's like you just drank some water. There's no sting or heavy flavor left in the back of your throat. That makes sense. Proteins are part of what is responsible for the bitterness of coffee. Kopi Luwak beans have fewer whole proteins than normal beans. So they're less bitter, but still taste good. As my husband put it, "Everything that is wrong with cheap gas station coffee is right about this."