Four books I cant remember either author or title

So I am embarrassed to ask but there are three books I can't remember the titles or authors but I want to find them again if I can.

1. Fantasy/ Romance. I THINK MMC was named Seth and he wss fae and she was human and I think it was about there were fae using glamor to live among the humans but she was able to see through it for some reason.

2. Fantasy. All I remember is reincarnation, people had to offer or sacrifice bones to get wishes granted and something about one of her past forms or God form involving gazelle horns

3. A Romance/ erotica series where women got sucked from earth into some other realm / reality. One had the ability to heal people and when she had sex she could see crystals representing the person's soul and the other woman heard violin music during sex representing emotions and she could create storms or move water or something with her mind. And that the marriage ceremony involved being connected arm to arm for a day or 3 days for some kind of ritual.

4. Fantasy series where the main character was a man with another soul sharing his body. I think it was an older time period and involved some kind of war and I think one of the personalities was a monk and the other was a warrior or thief or something.

If I remember more details later I'll update.