I'm posting this here aswell. I (Infp, F, 25) am happily dating an Estp (M 27) for almost a year now. We're madly in love. Since the beginning we both never wanted to be exclusive. Idk if its because of that but our relationship is going so well. An open relationship fits his needs of freedom and adventure. It is also something I value deeply (freedom, independance). I just dont believe in monogamy anymore. It fits my needs of liberty and communication. We also share similar worldview and political opinions which help a lot. This kind of relationship requires A LOT of communication, transparency and honesty. It implies to talk a lot about our feelings, when we're jealous or in the opposite when we're feeling compersion. And as a true Infp i looooove talking about feelings. I do notice some differences between us. We both need time to process our feelings but when he expresses his, he is often not so accurate / precise as I can be. He would tell me "I feel weird" "I feel worried but I dont know how to explain" when my expression of feelings is much more precise and detailed. He is also much more carreer oriented than i am. I've told him all about MBTI buut he's like half interested.

I teach him how to be more self aware of his own internal feelings, how to see beauty in everythings, to keep an optimistic perspective on the world. He teaches me how to be more in the moment, to enjoy things as they come and to not always worry about their hidden meanings.  Sex is great aswell, we are both very tactile, sometimes really romantic sometimes just wild, I like to experiment things as he does.

The downsides :

• im more polyamourous than openrelationships because I can't separate sex and feelings. I mean i could force myself to have a colder heart but i just dont see the point since sex is so much better when you have a connexion (and also... hormons). It is something he has a bit of trouble about (but he's great and working on it). He fears that i'll end up loving someone else more than him.

• He is very talkative, more than me, and he can go on and on about very... sensitive stuff that dont really matters to me. He'll talk about his passion for old cars (honda civic vrrooom) for hours and sometimes i'm just like.. whatever man. I feel like he doesnt leave me the space to express myself as I need more time than him to process and express my thoughts. I'd like to find a way to tell him nicely that sometimes i need him to just fuck the shut up and lemme think. If you have advices on that ^{^}

• we def dont have the same level of energy. I dont always want to follow him everywhere, sometimes he wants to do 5 hours hike when I just want to netflix&chill. But as we both value freedom and independance we manage to find a balance, it happens that i just leave him to do his things. I think he'd like me to go with him but ehhh, compromising is key. Sometimes he goes to do competitive driving for instance and I just go fuck another guy and he doesnt mind.

Overall he is a really great guy. Nice, caring, thoughtful, fun to be around. I've heard everything and its opposite about ESTP / INFP relationships but for us it's definitely a match

In terms of cognitive functions i'd say this kind of relationship fits my Ne since i'm not closing any doors. It also fits my Fi as I value freedom and independance. It's also a challenge sometimes, jealousy is not always easy to manage but it hides insecurity and is therefore an opportunity to work on them, to self develop, to self reflect, things that INFPs also love doing.

(Sorry for any mistakes, i'm not a native english speaker)