My (31F) husband (31M) is obsessed with the idea of me having a threesome with him and another man. I don't want to. How do I get him to stop asking?

My husband and I have been together for about 8 years and married for 6. I've always really been into the idea of polyamory, and my husband is not. <br><br>Over the course of our relationship, my desire to explore that has waned completely. It was something that I wanted in my mid-twenties and realized that it wasn't for me. When my husband found out that I used to be into it, he obsessed over it. <br><br>He forced me to explore that part of myself. All in the name of him exploring his own sexuality and figuring out what he likes and dislikes. He is the only man that I have ever been with. I have been sexually active since I was very young and explored on my own (masturbation, sex toys, etc.) but I always knew that I was interested in men. <br><br>We had a 7 month period early in our relationship where we explored non-monogamy and had an open relationship. We had a lot of threesomes. When I told him that I didn't want to do it anymore, he was very upset. It took a while for him to calm down and let me have the relationship that I wanted. <br><br>We've been monogamous for about 3 years now. But he won't stop asking me if I will get into a threesome with him and another man. He's obsessed with the idea. He tells me that he thinks I would love bringing another man into the bedroom. He tells me that we used to have so much fun doing it and that he wants to try it again. He says that he knows how "sexually adventurous" I am and that he knows that I will eventually want to do it. <br><br>I've tried to explain to him that I'm just not interested anymore. And that I want to keep our relationship private and intimate. The relationship that we have is exactly what I want and I don't want to change it. <br><br>He doesn't listen to me. He is very persistent and won't drop it. I don't know what to do. How do I get him to stop asking me?