The best? That would be Charmaine at Extreme Bodycare. She is a master and takes a fair bit of enjoyment in giving them. She has a whole kit of implements and makes sure to find something particularly suited for you. She once gave me something to take home and practice with, she is trying to graduate me to strap ons but I'm afraid I still remain a novice.
Cherry at 50th Street massage is also extremely good and well prepared for this service. Although she might not make it a focus of her sessions, the way she incorporates it into sensual massage and sexual positions make her a stand out. WE had one of the best orgasms once with her doing reverse cowgirl and massaging my prostrate with a finger, absolutely amazing!
Lilith, she is independant but does one evening shift at Elite Retreat. She is a skilled Dominatrix but I like her softer side. She has a gift I think, or just knows me because she always hits the perfect spot. I have had so many mind blowing experiences with her but the two most memorable were a duo getting a double BJ while Lilith massaged me with a finger, and the time she tied me up....OMG! She had this long, skinny flexy vibrator and with my legs spread eagled she warmed me up real good, then got on for cowgirl leaving the vibrator in place. She untied my arms so I could come close to her in a sitting position and those vibrations went through my cock stimulating us both, it was an out of body experience, indescribable....I'll never forget it.
And lastly there is Paige at 50th, Legends and one weekday at Elite. Not sure if she actually offers it but if she gets in the mood you are in for a treat. She made me ejaculate while flaccid by prostate massage! Can I recommend this? Not really, almost feels like you've had an accident and I was embarrassed by it, but quite a sensation feeling the cum pump through your soft cock, it was weird and unnerving.
Hope that helps.