I'm not sure that has anything to do with him being poly-curious. Sounds to me like it has a lot more to do with him choosing a woman to date and then finding out *she* isn't okay with poly. That doesn't mean *he* isn't. My ex-boyfriend was totally cool with poly (other than the whole thing about being afraid his employer and some of his family members would find out he was dating a married woman) until he met his current girlfriend, who not only isn't okay with poly but isn't okay with him even having female friends. That, and our excruciatingly painful breakup and ending of friendship, had nothing whatsoever to do with my ex's thoughts on poly, and everything to do with him falling for an insecure, emotionally manipulative woman who bullied him into doing what she wanted by telling him she would never speak to him again otherwise.