This question has been going through my mind for some time. As I have mentioned before, my XN is Indian, and he is 38 years old. He would have been expected to participate in an arranged marriage. He is now 38 years old, and is no longer in a situation where his parents can poduce a suitable 20-30 year old any more. They would be looking for someone older, with the same qualities.
Any future liaisons are likely to fall apart like the first one also.
My relationship with him is now also over, so, on the face of it, he has lost all his sources of NS and his chances of getting more are getting remoter as time goes by - especially as his ability to interact on an emotional level seems to be deteriorating. I hope someone can answer this as it is something which has puzzled me for some time now.