I really don't get why many serial killers (Bundy, Ramierez, etc.) and violent murderers attract such romantic attention either after being sentenced to death row or confined to a life of staring at walls.
I tried reading a few articles on the topic, but concluded that the experts are simply guessing as to an answer as well.
I do believe that Joran will likely need those "relationship" escapes to survive his incarceration considering he is temporarily in a correctional institution where, back in January, the new warden was murdered on the premises on his first day on the job.
Prison life will not get much better if, as most insiders expect, Joran is transferred to Lurigancho Prison--which is considered one of the world's worst facilities.
Perhaps, the other inmates will just want Van der Sloot to sign a copy of their Ocean's 11, 12, and 13 DVDs.