Lets talk 3sums!

So me and my boyfriend have been together for 6 years , we have a beautiful 2 year old and our relationship is pretty solid. We're thinking of having our first 3sum , im excited for this because it strangely turns me on 😅. Anyways I wanted to ask if anyone had a good experience with this type of situation! And uhm where should we look for a 3rd party? Lol definitely not in our friend circle but idk maybe tinder 🤷‍♀️😅