"Slutty Norman?" The sluttiest person in that prison was Sword, even while he was "with" Sen. I think the outside world would give Sword unlimited opportunities to cheat some more on Sen. I'm not being negative, just realistic, based on the mangaka's habit of having her main characters sleep around.
I actually agree with you,The nature of Sword character will lead him to sleep with the first one he meets if he fought with sen,He'll simply embrace the nearest chance he gets to sleep around.
A habit or a desire couldn't choose...
Both Sword and Norman are acted slutty in Prison. Thats the nature in that kind of closed up environment that you will seek sex or companionship with fellow inmates regarding of being "exclusive". Just as long they get their rocks off.
I kinda feel sorry for slutty Norman,Yes he fucked any guy in the prison who would look at him but i think he was looking for some guy to love him like Sen has with sexy Swordfish. It would be great if the author would write another sequel focusing on how they cope with the outside world.