Any more replies more specific to these questions? Doesn't have to be all of them

Having a relationship with anybody will involve Ego as Ego is being separate from another. The best teacher is the other half when two people come together and try and form one.
Sex is needed to bare children so it is natural (ruleset) to have the urge to do so and in a less ego relationship the sex is about satisfying the partner more than the needs of yourself.

I said it in another thread but an egoless relationship is about being selfless in a relationship. It's not about serving your own needs but making each other happy. While people are not responsible for the other persons happiness, they can be a form a support for the other person. They can help the other person when he/she is in need. The best relationship IMO is when this is even. When one person is being used then it is not an egoless relationship. There is still some selfishness involved. While some sacrifice is needed to make the other person happy it's not something that is to be abused by the other person. That is when one side will be incredibly unhappy. Because nobody wants to be used. It should be about each other growing and evolving towards love where it's not even sacrifice but it's about making the other person happy.

When you love someone, without ego, you just want their happiness. Even if that means leaving you. You place no hold on anything they do, and derive joy in their living their lives exactly as they do, no matter what that entails (setting aside, of course, behaviors which serve their appetites before the needs of others).

It is the same with the sex. You take joy in your pleasure, and also in giving the other pleasure, and in giving the other the knowledge that they are giving you pleasure. But you don't get attached to the idea of YOU doing that. You don't 'own' it, so to speak, setting it high upon a shelf with pride. The REAL you is the incarnating soul hanging out to witness it all.

And, in an egoless state, the self is perceived 'as other', and that changes everything right from the gitgo~

M~

Two people smiling calmly at each other with no noise and a connection that cannot be spoken romantically. Platonically, a cheerful smile with no noise and a connection that cannot be spoken. Egoless sex is just love. If egoness is coming from one side, then that person will not experience love, but fear and emptiness. I can't give you an intellectual response cause I don't have one and it has no meaning.