mauvepink - I know from my last job that when illegal immigrants (we don't use the term aliens in the UK) working in the sex trade are arrested, they are handed over to a police team that specifically provides assistance for trafficked women. I never saw any examples of men being trafficked for the sex trade. The women are kept in safe houses and if they wish to claim asylum, which they frequently do, then they receive help with their claim. If they eventually have to return home, then this too is dealt with as sensitively as possible. One arguement against legalised brothels is that a lot of street-walking prostitutes lead such chaotic lives that they would not be welcomed by most brothel owners.