Abel's older brother from "Ye Olde Testament". He smashed Abel's face with a big-ass rock, and was then doomed to a miserable existence by God.
God: "Kain, where is Abel?"
Kain: "I don't know. Am I my brother's keeper?"
God: "You smashed his face with a rock, didn't you?"
Kain: "........NO."
God: "You're f**cked."
Any form or forms of male genitalia i.e. penis and testicles.
Stacey - "Steve, I'm all hot and bothered... what are you gonna do about it?"
Steve - "Probably whip out my sweet, sweet manitalia..."