I don't get it, where are these sickos getting your phone numbers from?
And why would anyone give a stranger more than 5 seconds before hanging up on them?
Its not that simple.
This guy is not just calling random people off a phone book.
That the sick part of it: he's actually doing research on the woman he calls.
When he called my wife he knew her name and some other personal info., so factor that behind the psychology why someone (and especially women) feel more lenient to talk, till the discussion gets weird and... that she realizes she has to hang up the phone.