Isn't it amazing how it's only ever a problem when people know about it . 
YES this man should be safe in the prison system. NO he should not be in Cornton Vale with women prisoners, who are expected to accept the secondary punishment of his presence and being used as tools to meet his needs and wishes as part of their biological burden, on top of the punishment of imprisonment.
But they only ever find solutions that work for women too when the facts go public, the total unacceptability of it is exposed, and people kick off about it.
After which women get whinged at.