I have an exclusive heterosexual relationship for a few years with a girl (We are both in our late 20s) with whom things have been wonderful. We both love each other, we have too much in common, we understand each other very well, we have complete emotional and functional compatibility and almost complete sexual compatibility, she is basically the person with whom I see myself growing old and living a full and happy life.

Sexual compatibility is not complete because I like the idea of ​​a non-exclusive relationship where I can occasionally go out and have sexual encounters with other women, while she prefers it to be exclusive (We have already talked about this, we understand both points and I was willing to accept her conditions).

I hypothesize that this difference is because she began her sexual life ten years before I did (She when she was 15 years old and I when I was 25), so while she has not been the only woman with the one I have been in, I feel that perhaps I needed to enjoy my singleness more, however I am willing to accept other points of view.

Is there a point where people get exhausted from having several sexual partners and prefer to stay with only one or will that feeling of wanting to have other sexual partners never go away and is it a sacrifice that must be assumed to live with the love of my life?