Unless your husband, a nice Italian man like me, is on board, you have a serious problem. In my case I was the one wanting other women and dating a few after I married. At one point I left my wife for another women but came to my senses two months later. My wife's solution was to invite her best girlfriend to have sex with me in our home and that ended up in a FFM threesome which then became a Poly Triad that lasted 38 years. What was a very bad situation turned into a wonderful life that I would not trade for anything.
It may be hypocritical but as a strong alpha Italian male, I would not tolerate my wife dating other men. I have seen how that ended for our three closest friends. There are always much better mates out there than the one you married and rules, trust and intentions not to fall in love go out the window when emotions take over and cause us to make bad choices.
I would not tolerate it because men are possessive, enjoy having sex with someone else's wife as a dominance thing and may work to get my wife to leave me. I know that by some strange magic I am not the only person in the world for my wife. There are other guys out there that could make her happier than I can, have more in common, less logical, etc.. It is risky business. Basically it comes down to how males and females view sex. Men can view it purely as sexual pleasure while women then to view it emotionally. It is not just my opinion. It is the way the genders are hardwired by centuries of evolution.
My only suggestion is to see if your husband would be interested in swinging or wife swapping. That is not the same as you having a relationship with other men, if you are just looking for sex that is. We found our best friends to be members of a local wife swapping group. In the last two places we lived, the locals had wife swapping or key clubs going. We tried it once and never again because the bad news is that we saw several marriages end because of the wife swapping. We lost three of our best friends to that and that scared us both straight.
Look, when you involve others in your marriage you are putting it at risk. We found that it worked best for us if we both loved the same person and did not permit outside dating without the other. We lasted while none of our friends did. Does not mean that it cannot last in different configurations but judging from many posts online, it seems that it seldom does. To me, poly is not just being able to date other people or have relationships with them. To me it is more than two people sharing the same life. However, I am old fashioned and today what we called something else, has been given a new fancy name to make it easier to sell to one's spouse.

I think open relationship, hot wife and similar more aptly describe what some call poly.
I can only suggest that you may want to try to play together like in a same room wife swapping or swinging situation. I know that I felt no jealousy at all in those circumstances because we were both doing it and not just her. Let's face it, not many people, male or female is going to be happy for long if their spouse is out there with other sex partners and they are not. If they are not, because they feel morally it is wrong or goes against what they consider a man to be, it is not going to work.
I seem to sense that many posts online concern problems with poly relationships. I never went online to visit sex forums until last year and perhaps that is because when it is going well for you there is not reason to post. Now that we are no longer in a triad, my wife and I miss it a lot. I had to go on antidepressants to get over the deep depression I fell into.
I wish you good luck and what you are suggesting sounds more of what is called being a hot wife. That is where the husband remains faithful while his wife has sex with other men either alone, with him watching or participating. To work, he has to be sexually aroused by it. Sometimes you can just role play by saying things during sex when he is very horny. You can test his reaction to what you say about sex with another guy. Some guys are very into it, at least online they are.
