To quote some lines from a particular Larry the Cable Guy and Jeff Foxworthy show:
Larry: That's why I always go in the cripple stool.
Jeff: Um, why?
L: Well...it's clean...gotta lotta room...and you got them rails for powersqueezing.
J: Is that a medical term?
L: Thassa medical term right there, powersqueezing. The cripple stool is the Cadillac of the poopin' stools.
I truly do not do this hilarious conversation justice...