I guess because so many ladies have a policy of not discussing details over txt/phone etc that many hobbyists don't try to discuss.
They get information from reviews or sites like p411 which allow them to look up a list of do's/dont's.

If someone wants to discuss details they almost always do it via PM on a provider/hobbyist site such as here at TER, never by text or email.
And usually they are looking for a specialty fetish.

Anyone who calls and goes into great detail is usually just stroking it.
And one of the reasons I no longer take calls from people I haven't met before.  There are Chatlines for that sort of thing.

That's why we have the reviews!

Prior to screening many ladies are not going to answer any of those type of questions.
After screening there are some ladies who will discuss your likes/dislikes but there are still some after screening who will not.
I suggest like others said reading the profile and reviews.

Just my .02

Before meeting with a new patron, I require a 10-15 minute "get to know each other" conversation to ensure that we have good chemistry and the same goals for a remarkable time together.  

For dinner dates, questions involve food allergies and other dietary restrictions.  Regarding dress code, some clients want to get out of the jacket and tie and dress casually while in Vegas.  I want to know if I should leave the lbd at home and arrive in more trendy/fashion forward attire.

Will his colleagues be at the same hotel?  I'd like for us to be prepared with a story in case we bump into any of them.

Is he sporty?  Afraid of heights?  Enjoy dancing?  When planning extended time together, I want to arrange activities that he will enjoy, or at least have some suggestions available.

Of course, explicit conversations aren't necessary, as my potential clients have most likely already perused my fantasy reviews and website to learn more about me and how I can take them to cloud nine and beyond!  

That said, come on over to my site!  Let's see what we have in common