Specifically, if you have a threesome with two women and a man (FMF), are you now obligated to have a threesome with two men and a woman (MFM)?
To me, the answer is an obvious “no,” but I’ve seen quite a few people and sites say otherwise. In order to be “equal,” you have to do both kinds of threesomes “for” your partner. I can’t find it anymore, but I remember hearing Channing Tatum talk about it years ago, saying something along the lines of, “well, yeah, a threesome with two women is great, but remember, you have to give her a threesome with two guys afterwards, so be ready for that.”

I think that view is absolutely bonkers. No wonder so many people have failed threesome attempts. If this is how you understand the dynamics of group sex to be, you really aren’t cut out for it, in my opinion. There are just so many problems with viewing sex through that kind of prism that it can be difficult to even begin addressing how wrong it is. I’ll take a crack at it, though.
First, threesomes and any other kind of swinging as a couple has to be something that both partners want to do. If one partner really doesn’t want to add a third person – even if I think they should be open to trying it out to see how fun it can be – they shouldn’t. And their partner should respect that. It doesn’t mean they can’t explore it again in the future, but you can’t get involved if one person isn’t interested.
Second, and related, is that you aren’t having a threesome “for” your partner. Your having a threesome with your partner as part of a mutual desire to have one. If a couple has an FMF threesome, it should be because both the man and the woman wanted to add another woman to the mix. Neither one should be able to say sometime in the future that their partner owes them an MFM because they did FMF “for” the other. No, you did FMF because you both wanted to. Neither of them gets to say that they had a threesome for the other because they both wanted it. Even if one of them had a greater interest in FMF than the other. And, of course, the inverse is true – just interchange FMF for MFM.
Third, if the above isn’t the case and one person was only having a threesome in order to use that as leverage over the other, that’s really shitty. I mean, really, really shitty. That’s sexual coercion and isn’t fair to your partner. If my husband had only been having MFMs with me in order to make me feel obligated to give him an FMF, I would have felt entirely violated, even if I did want to have an FMF with him.
Fourth, viewing sexual relationships and bringing extra partners into bed with you as being so tit-for-tat is an extremely and overly simplistic way to view equality. If you have FMF you have to have MFM, or vice versa, is a child-like way to think about equality in the complex relationships that adults have. It just doesn’t compare to “Well, Jane had a turn with Toy A, so now John gets a turn with Toy A” like we tell our toddlers when they argue.
But, if you want to check out some of my works where the couples are happily having threesomes and foursomes, please check out the below: