he honestly is proding you. He sounds more like a cuckold.
While there is nothing wrong with beign a cuckold the interpersonal ddynamics work very differntly.
He is proding you to verbally humilate him and feed into his fetish of you doing so and being with other men.
I would suggest look into cuckold resources and see how he reacts to those. If he is responding to those then you need to address the differnces of poly verse being a cuckoldtress and if you are ok with becoming his.