Okay! I am not going to judge nor put you down for wanting to do this. I know from my past mistakes a little on the subject.
1.) A succubus (femaile sex demon) or incubus (male sex demon) is a being that only visits humans to have sex with them. I have not had any personal interactions witch them but have heard the testimonies of people who have, so rather you believe in them or not is up to you. However I have heard that incubus or succubus gets attached and possessive to their human, and if you are interested in another person or being besides them they get violent. Also don't summon one unless you are willing to have sexual intercourse with one, because once they are summoned they will take it if they want it. I highly reccomend not summoning one.
2.) You don't need to summon anything to have an OBE (out of body experience) all you need to do is astral project, which they have many helpful videos and guides on youtube how to do so. If you have any questions about it feel free to contact me.