My GF would like to receive an erotic massage from a handsome, hard bodied guy while I watch.  I realize this site is geared towards women offering their services but since I've been coming up short...um perhaps I should rephrase that.  Since I've been having a difficult time finding the right provider elsewhere I figured I'd give this a shot.

This is her first foray into anything along these lines therefore she is picky...and deserves to be.    He needs to be able to provide a real massage.  Be physically attractive, respect her limits, and cool with me being a non-active participant.

I hoping someone can point me in the right direction.

I'm sure you could find some very hot and talented straight or bisexual massage therapists on Rentboy.com who would be happy for a change of pace and would be into respecting your GF's limits and your non-active participation.  There are hundreds of options in NYC.  I specifically searched for Bisexual Masseurs and came up with at least 20 options, and some of them look really hot.    The website is mostly targeted toward gay men, but I imagine, similar to many of us ladies who are also bisexual and target our ads toward men, if they advertise as bisexual, I'm sure they would be happy to see a female client and would have no problem with your presence.

I know of a gentleman he's beautiful... former dancer, 6'2 built like a house, intelligent,sweet, heart of gold. Very tender, trustworthy and knows how to treat a lady.  

It really depends what you're after and your comfort level. He arrives in a timely manner and anywhere in the city.

A very different experience than cowboys.

Great recommendation! There are definitely a ton of REALLY hot bi boys who would love to get an opportunity like the one OP is asking about.