Had some buddies who used to do that back in the day. The prerequisite was being kicked in the head a time or two bronc riding!
Last one I spent any time with was when I was moonlighting in the ER out in a little town called Omak, Washington. (Home of the Omak Stampede.) He and his buddies had been out riding bulls for fun and I was trying to close the 5" gash in his forehead. Every now and then he would wake up out of his coma and ask this girlfriend, "How did I look Honey?" She would reply, "Just fine darlin'."
(No bull was injured in the making of this post.)