I love toys!

If a client brought a cock ring to a session, I'd have absolutely no problem with it.  In fact, a lot of my clients do bring them to sessions.  

If you're unsure of how a particular provider might react, I'd ask her straight up if she'd mind you bringing one.  My guess is that she wouldn't.  

Have fun!

I use them for people who either need added excitement or a little help staying the way I want them.  Yum, bring on the toys

I've had a few clients who brought cock rings doesn't bother me at all, whatever gets a guy off and feels good for him