u/EitherOn80Or3percent

I want to have a threesome he wants us to have a threesome. I am the only person hes ever slept with, I have slept with I wouldn't say a few and I wouldn't say many. He and I have explored eachother at length what were into what were comfortable with we got together in our mid 20s were now in our 30s we met when we were kids and had a on off thing till we started this relationship. He is not attracted to men but open to trans women Im bisexual. He really wants to see me satisfied and hed like to be a part of that so not a cuckhold situation. idk what to expect or where to start he is also in that situation so its nice to know we both are feeling interested but cautious. I do not want couples or females I am mainly attracted to females but I dont want him to be with one he is curious but respects my boundary. I am uncomfortable but we are curious so im just trying to see where we can start and what to expect.