Love your blog, Aggie.
I wish I had something to say on this topic, but I'm still so new to poly that I have almost no experiences with dating someone with a primary partner.
Unless I count my college boyfriend from 10 years ago--but he and his "housemate" [primary partner, but not using that label] were complete nutcases. So nothing of my experiences with them would apply to a world where people don't lie routinely to each other
Oh wait, I've got one:
- Insist that your primary and I have to be best buds. We might like each other just fine, respect each other's relationships with you, but have no interest in hanging out as friends.