Actually, I don't know whether the answer was what I said, or "It will worsen your relationship; you are now done thinking about it". My intuition says that since I'm in Michigan while my boyfriend is in North Carolina (which does sound unwise, yes), sex with someone else would invariably lead to us being too far apart.

And it just seems weird.

This is entirely based on intuition, of course, not conscious reasoning, but consciously reasoning about it seems unnecessary somehow.

Okay, I got a glimmer of "polyamory simply means more options; there couldn't possibly be anything wrong with that". Responses coming back: "He would object." and "Focusing on just the two of us will result in that relationship becoming stronger." and "It's more intimate with just two."

And now, on the meta level, I'm thinking that conscious reasoning is unnecessary, as this is entirely about values, not facts.

So, so far, my mind is not changed.