how do you ask if a provider is into something special.  It's not like you can email the specifics?  Afraid if I do I would get rejected.  I've read reviews and some hinted at what I'm into but...  (Prostate milking, Strapon and toys for boy)
How do I discreetly ask without crossing the line?

PM the reviewer

once someone fills out my form with legit refs then i am open to speaking freely with that person about their wants and needs. Also, just posting on TER what you are looking for most providers who will do what you seek will chime right in.

as long as you have already been screened. In fact I love hearing your fantasies.  
 

I would love to see you

You can always hint, we are pretty smart girls ))  Or you can put a post on the board and see who replies.  I would love to see you and do everything you are asking for.

LaRue, would be a great choice.  Some others, Kit, Arden Moon, Mya Chan, and I'm sure lots of others.