Our Corrections system does allow this - that's the problem in my opinion. The guards who turn the other way, the supervisors who don't reprimand them for it, the leadership that doesn't want to talk about it. Prison shouldn't be fun, but the punishment should be more along the lines of hard work, solitary confinement, endless boredom. Instead we allow the prisoners to create their own society and their own rules within their prison. Our government employees are responsible for allowing that, and ought to be held accountable.
I have a few prison guard friends who tell me two things:
In New York in the federal prisons one works in, the rape incidents are rare, it is not like the movies at all.
In Connecticut, at Somers MAX, however, the homosexual sex is consentual at night in the cells, and it is almost everyone of them that is doing it to each other!
That shocked me!