Some good things there to always ponder, but one thing you are forgetting is that every person, every couple is different. People are not all the same,I am sure you knew how it's going to play out once you share or give your wife/gf to someone like BBC. Once you open the Pandora box, she will experience someone who is better than you, its only a matter of time, you become less and less in her life, unless she is keeping you there just to pay the bills or the inferior role you wanted to be as a cuckold. Don't blame her, it was your idea.
Remember, you should never cut anything, unless you measured it twice or more. once its cut, its done.
and many people forget that. What is right for you, and works for you, might not be what works for others. But thanks for your advice, it's always good to listen to others opinions.