Thing is, if he kills himself, some unlucky prison officer will have to deal with the body, the authorities, the paperwork and all the associated security issues. Dealing with swingers may be an occupational hazard, but it's not a pleasant thing to have to do nonetheless. It's not as though they get paid a fantastic wage for doing it.
It may astonish you, but there are prisoners who genuinely want to just serve their time quietly and reform themselves. It's these people who deserve the prison officers' time - not sickos who have no intention of changing at all.