I'm flabberghasted anyone in this day and age uses the term 'common prostitutes' and thinks anal sex between heterosexual couples is more or less confined to Africa. I personally am not at all worried about this, I can't imagine why anyone else is either when you consider anyone can go out on the pull and give blood. there is someone I know who has slept with literally scores of different people since Christmas and they are neither a sex worker nor a gay man, in fact theyre quite respectable and work in an office, so how can you possibly hope to tell who is or isn't high risk?