That's kind of bizarre and I'd be surprised if the lead flight attendant would even bug us with passenger service issues like that when the final paperwork arrives! I can't see us delaying 200-plus passengers so we can disarm, open the door and allow passenger to fellate the aircraft.
Can't delay the flight because of superstition.
Besides, what happens if a passenger said, "I forgot to sacrifice a chicken before I got on the aircraft..."?