"improper questions" - several times I've been face down in some woman's flat and she's answered every call and all you home in on is "No, it's not that kind of massage", which kinda kills the vibe more than just jer taking calls already has.
Though "You'll just have to come and find out" is a good one.
I suppose we're spoilt on here, tripping over intel. I can appreciate why some blokes don't want to chance it.