No..it’s nothing related to adult industry. A Chicken Sexer is person who distinguishes the sex of chicken hatchlings- sorts them into male/female groups. This is a full-time (apparently) job in commercial hatcheries where female chickens are destined to lay eggs and the males end up being lunch or dinner for us.
I saw the episode of ‘Dirty Jobs’ on Discovery where Mike (the host) tries being a Chicken Sexer. Gross.