Do they really enjoy it? You'll never know. Just like you'll never know if she had a real orgasm. So you should simply be looking for girls of permit COF, which is easy to figure out by reading reviews.

That you include in your post WHERE it is that you’d like to engage in this activity.  (And please don’t say on her face lol)

 
Also, just fyi, these types of posts seem to get more attention on the regional boards. Just my own observation. You might try that.  

 
Hopefully you got some PMs about it. Good luck!