Jack Goes to the Dentist - S7-E2
Character mistake: When the dentist is putting cotton in Jack's mouth he neglects to put on rubber gloves first as dentists are supposed to do before any dental work.
Jack Goes to the Dentist - S7-E2
Character mistake: Terri's boyfriend, a dentist, says he took the Hippocratic Oath then corrects himself saying it's only for doctors. Dentists also do take the Hippocratic Oath.
Answer: He's not a Catholic priest. He's a pastor, with the title Reverend, at a community church who chooses to wear a clerical collar. Some people still address pastors as "Father" though. I'm not sure of his religious denomination, but most pastors can marry.
Bishop73