When I hired into the CYA, the institutions with inmates over 17 allowed Playboys and such to be mailed in to the inmates.
We got a superintendent with some balls and he called a meeting of supervisors to announce the new policy of no porn magazines. He said certain body parts could not be shown. One old-timer asked “Do you mean beavage and cleavage or just beavage.” 10 minutes of laughter.
Magazines were banned.
I bet that did not go over well with the inmates...