Two cowboys are staying a couple miles outside of town on a trail they used for herding cattle. While taking a shit behind a bush, one cowboys gets bitten on the penis by a rattle snake. He alerts his friend, who jumps on his horse and races toward town seeking a cure. He reaches the doctors office and runs inside. The doc explains to him that the only way to save his friend is to suck the poison out. The cowboy jumps back on his horse and races back to his ailing friend. When he reaches his camp, the frantic cowboy cries out "What did the doctor say?"
To which his friend replies "He said you're gonna die!