This from the groaners listserv. The author is unknown.

Father O’Flaherty tried to enjoy himself at a baseball game, but the man sitting next to him kept bothering him with lots of questions. The priest bought a hot dog, and the vendor handed it first to the talkative man who passed it along to Father O’Flaherty, who downed it in one gulp.

This was the first time a hot dog had ever gone from the prying fan into the friar.