Succubus and incubus experiences are caused by nonphysical entities who are visiting you. By definition, nonphysical entities do not have nerve endings, and so they cannot experience physical sex. What is happening is that a wise, compassionate nonphysical entity is making you have all the physical sensations of having sex, but it is literally all in your mind. The reason that nonphysical entities do this in the first place is to encourage you in your sexual development. The message is: "Sex is good." That is the long and the short of it.
I will do a card reading for you about this.
Eight of Hearts: Things coalesce, dovetail together.
Queen of Diamonds: Something is fertile, has great potential.
Nine of Diamonds: A seeming restriction has the effect of guiding you in a more enlightened direction.
King of Spades: Great primal strength, energy, creativity, effectiveness, or potency comes into play.
Two of Spades: There is a struggle.
Ten of Hearts: You enjoy supportive conditions.
Two of Diamonds: You figure something out.
Nine of Spades: You are on the wrong path.
King of Diamonds: You achieve balance, harmony, and more control.
This is telling you that the whole idea of your having succubus experiences is to get you to explore your sexuality with members of the opposite sex, not with nonphysical entities. Your nonphysical entity is a finger pointing you in an enlightened direction. You need to go in that direction. Focusing contentedly on your nonphysical entity for your sexual fulfillment is not the message it is trying to impart to you.
I just did a one-card divination for myself to double-check the accuracy of everything I am telling you, and I pulled the King of Clubs: Trust, faithfulness, and reliability come into play.