Sure!
So our first is pretty standard but protection must always be used. I am on the pill and he also seeks out partners who are proactive with their own contraception, so we are doing everything we can to prevent pregnancy.
We also have agreed to be emotionally monogamous, which means that if we ever feel we may develop feelings for someone (or them us) we end it immediately.
My husband prefers to see someone a few times and then move on, he finds this better for keeping clear lines.
I prefer to see the same person as long as possible. As a woman it is very important to make sure we are safe and trust the person. I also am quite picky and don't feel chemistry with loads of people.
We also have a boundary that it can't be anyone we know, that is in any way connected to our social circle or work.
We are okay with a couple of dates before intimacy in order to get to know the person, but we don't really continue beyond that. Once we feel safe, it really is about sex. The lines can get VERY blurry when you are also going for dinner with someone and dating them. For us, this would start to verge into emotional territory which would in our relationship be cheating.
I enjoy establishing a friendship with the people I have been intimate with, but my biggest problem has been the men getting incredibly clingy and saying they have fallen in love with me and asking me to leave my husband.
A lot of men adore the idea of a woman who says she just wants sex... But then they realise they aren't your priority (your DH is) and the ego comes into play.
We also have a rule that we cannot have phone calls or be texting a sexual partner when with each other. The thought of us cuddling up and watching a film and one of us texting an intimate partner feels gross (to us).
We tell each other the night that it is happening (approx once a month) and then we don't discuss anything else. I have no idea how many people he has been with, what they do, who they are and same in reverse.
The only time we have ever discussed someone is when a man got very clingy of me and I found ending it hard. It was my first intimate partner and a huge lesson for me as I did get in over my head and didn't keep the boundaries as clear as I needed to.
We also never have the people anywhere near our home. We either go to their places or hotels. Our home is for us and for "our time".
We stick to once or twice a month and we find that is enough. It is time apart where we can explore our individual needs and then we just get on with normal every day life. Keeping it a small part of our lives has ensured pretty much zero issues.
I've written a bit of a novel here, but if you have any questions I would be more than happy to answer :)
Edit: we also have a no social media rule. They can't follow us and we can't follow them. We try to protect each other as much as possible and we prefer not to see who the other is with.
We also operate ethically and are completely honest with potential intimate partners. We share all the boundaries with them before anything happens, so they come into this as informed as possible.