I chatted about this particular subject before with a lady and i maybe naively thought the simple answer would be to tell the boys in blue she was my girlfriend etc which wouldnt be implausible, they couldnt prove otherwise as we were both young and friends anyway but she really opened my eyes and explained that wouldnt necessarily work if she was with a 60 year old or older. While not impossible, it wouldnt be as believable as if she were with me or another young client when the knock came. After that it made me realise that there are alot more pitfalls for the ladies doing this job than the punter seeing them and it made me appreciate the work they do and things they put up with all the more after