Absolutely the most important thing and expressed for more eloquently than me.The only thing I’ll add for your consideration is based on the love and concern you have for your husband is that when discussing and sharing, you might want to be mindful and go out of your way to create a safe space for him to disagree and share his fears, trust me they’re there.
And you have to make the decision about what happens if your husband says no. It's a huge step for a lot of people (particularly if your prime motivation is to have sex with others) and one he may not wish to take.