I certainly concur. Being bisexual myself -- and a longtime advocate of polyamory -- I would never agree to inviting a third party whom neither I nor my partner feels 100 percent comfortable with. Especially since that third party isn't someone you know very well. That alone would set off my psychic "DANGER! DANGER WILL ROBINSON!" alarm. It would be an entirely different story if that third party was a longtime mutual friend of yours (Emphasis on the word "longtime"). -- Skeeter