I’ve had something along those lines, but the cause was when I was a very young child when something unmentionable happened to me - enough said on that. But yes that did form a sort of marriage to a demonic being. Nothing really happened till early puberty where I was compelled to masturbation, but was not successful at the ‘ending’ at first. Once I was mature enough to get to the ending, I started to have sexual dreams which often ended as a wet dream. These grew in incredible ways, far more wonderful, and able to experience what is in the bible written as two becoming one flesh. This persisted into my 30’s.
This also I believe had a great effect on my social life, particularly my dating life which didn’t start till age 27. This was later revealed to me that the marriage I was in was a spiritually enforceable contract, and this demon would try to chase away any potential rival by rite. I did however manage to get married at age 29 or 30 (I forget), and for that time the sexual dreams stopped, but that marriage devolved to that same form of isolation that I had before and would be considered sexless.
After the separation and then divorce the wet dreams came back. But they were starting to get different. Most peculiar when I came I would usually wake up with evidence of a wet dream and have to clean myself, however if I came inside her, I would wake up with no such evidence and it was like she was stealing my seed. It is this time that I learned about a demon called a succubus and how it is a female demonic being that steals seed from men to somehow use to impregnate others - that tidbit was the key I used to break that spiritual contract getting rid of her, but not at that time.
After I found out what was happening, in a dream when she came to me, I told her to go away, that I no longer wanted to be with her. She told me that she as a right to me, as we were married and she will take what she wants. From this point on my dreams became night terrors. They were so horrible that I tried not to sleep. During the day I was living in constant fear and anxiety that I had to sleep and be tormented.
The dreams, one by one put me in greater and greater states of bondage, I was slowly losing the ability things like movement, and my ‘dream like’ powers which sometimes involved flight, and most importantly the ability to end my dream from within the dream which was taken away in a most horrifying way. I would wake myself up, only to find I am still dreaming and still in that same horrible place. Over and over, thinking I was in my bed awake, sure I was awake, just to find I was in that other place being toyed with with these beings who were refusing my ability to leave. Sexually with this ‘thing’, it devolved to she would appear out of nowhere in the nightmare, she would come up to me face to face, in an instant I was inside her, ejaculated and she would leave. That fast. No pleasure buildup - no pleasure, purely mechanical. And after that happened I would feel decrepit, violated and robbed.
But I was also in deep study of the Bible at this time and learning about my power in Christ. And in this I tried to wield the power of God against her and the others, and yes it did make some progress, but also they increased their effort of bondage to where if I tried to approach them, I couldn’t move towards them.
Eventually I put together that key, that this demon, by using my seed to impregnate others, was committing adultery, which is the only reason Jesus gives for divorce. While awake I wrote her a certificate of divorce, and burned it to sent it to her realm add … that was it she was gone, I never experienced her again. Now, for completeness there was another demon involved that I had to battle, a child demon which also was dispelled in about the same time frame, but that’s doesn’t seem that related to the OP.