Excellent post, I am married to a spirit (not an incubus) and am devoted to him, BUT all the points you raise are important things for people to evaluate.
I’ve added it to the first post in this listing: Unofficial Forum Tutorials Directory ~ Beginners, Check This Out! 👍
A succubus (or incubus) isn’t just your dream partner you don’t have to buy things for or tend to, and yes, some will literally try to take over your life and consume your time, and they can make it so that you willingly give consent, which you would not previously have wished to do.
Therefore, choose with GREAT care, ideally making sure that your agendas align ahead of time.
Alliances with known spirits, or spirits gifted to you by a high-ranking demon, god, or goddess, are probably safer and more stable (especially with regards to perceiving and experiencing their darkness) than just randomly picking up astral hangers-on.
Spiritual sex, and all other types of relationships up to marriage, can have impressive benefits (ensure these are contracted AHEAD of any binding union, and that IMO includes any sexual acts) and give you insights and experiences which could not be had by any other means;. but they also have downsides, and the potential to turn out very different to what you expected.