I have a suggestion.  Many users here are probably going to use TER to find that perfect duo for their first doubles session.  I am currently in that process right now.  Currently a doubles session is filed under one or the other provider's ID.  I think there should be a check box in the original review to indicate whether this was a doubles session. If checked, then the review should link to both provider's list of reviews.  Then add in a search feature in the search to specifically find doubles experiences.  Right now, you can search for providers who WILL bring another girl, but not for specific doubles experiences.  If all I want to read are recent reviews of doubles experiences, there's no search feature that will let me specifically do that, and rate accordingly.  I think this would be a useful change to the search and review procedure so that providers who are providing this service are easier to find.