Prison isn't supposed to be comfortable or pleasant. It isn't supposed to pander to their impulses. Lack of impulse control is generally why they are in prison to begin with. Take away their porn. Take away any and all materials with any depiction of women whatsover as far as I'm concerned.
On the other hand, if they want to behave and learn to control their impulses and keep their cells clean, reward them gradually with a relaxation of restrictions on reading materials. If they wish to be treated like responsible adults, let them demonstrate they are worthy of such treatment.
Their choice.
but what about mom?
I thought that keeping their "cells" clean was the purpose. Now, if you are ambidextrous, you get twice the lovin' at no charge. If there were more MBs it would put significantly reduce the mafia since prostitution would tank significantly. I'm just trying to put another "twist" on this thing. hehehe