Do you want a demonic succubus/incubus personal lover bound to your soul and into your service? He/she will be yours and yours alone. Do you want to enjoy having love and sex with a demonic being? Fulfill your various and forbidden sexual fantasies with a spiritual lover?
The succubus/incubus will never harm you in any way. She/you won’t get pregnant from having this kind of union. And if you want him/her to stop, make it slower or harder or simply return back to the Hells until you call him/her again, then it will happen.