I would, as well, recommend some caution in using socionics to solve problems in marriages and long-term relationships. Like others pointed out, typing has to be made correctly first anyway. Correct typing, depending on your prowess and methods, might actually take a long time to process. Speaking for myself, at around the 1-2 year mark I was still doubting my typing. For my wife, I doubted for much longer than that. Sometimes I still do.

Anywho, if you guys really are in a relationship of benefits, I wish you the best of luck. I know this type of relationship fairly well from both sides, as I had a long-term relationship with my benefactor for 3½ years before my current wife. My little sister, on the other hand, is my beneficiary. As a beneficiary, I enjoy the company of my benefactor and he can make me feel good. But I often feel ignored, like whatever I say doesn't matter. The pain from this is great. From the other side, as a benefactor, I have the feeling like I just want to be myself and explain things. But it's the beneficiary who wants to grab all the attention and make me listen. Sometimes I rub my fingers together and wonder when will be the time when I can talk again, when can I continue my story again. Beware that it is the beneficiary who will leave first, and you will probably not be able to understand why. As far as I know, the benefactor is pretty oblivious to the needs of the beneficiary. By needs I mean the need to develope and process the creative function, which is ignored by the benefactor, hence the pain train.