"Visiting the Nudist Colony" joke
A church deacon learned there was a nudist colony in his parish and decided he should visit the place to let the nudists know they'd be welcomed at the church, properly dressed.
He was advised that he could only enter if he removed his clothing to which he agreed but requested that he be allowed to retain his clerical collar, which request was granted.
After an hour or so, he noticed he was being closely and continuously observed by an attractive nudist. He approached the woman and said.
"If you're wondering about my clerical collar, I'm a deacon in the church." To which the woman replied, "Oh, no, I was looking at your balls, I thought you were a canon!"