Not directed at the OP but others who do it, just because we're hookers that doesnt mean we cant be logical or smart. It doesnt mean we are not people and do not deserve respect. Time and time again I read comments here and I really cant believe all are able to say some of the these things and still get dates!
I know know who cares what she says but come on boys at least try to be respectful in public areas
to the topic, I dont know why a lady would need 5. I see the need for 3, but maybe 5 is just the magic number that makes her comfortable. It shouldnt really matter what makes her comfy to see you, if you dont meet requirements or dont like her cautiousness then there are about a million girls in this city. If I were on the other side of the fence I would want to do as much as I could to make the other party comfy without being absurd, when the girl is comfortable the session is SO much better!
As far as them being recent, that is definitely important, people change all the time, and a recent ref is more likely to remember details that might be important.