Quote: It is the level of intimacy that is going on in the relationship that defines the difference between roommate and spouse.
Absolutely! I happen to know a lovely older couple who, because of illness, are no longer able to have sex, but who have a very loving and extremely intimate relationship. I know because I am related to them, and I happen to know the situation (I'm a nurse, they asked my opinion at one point about this medical matter).
They aren't sexually involved anymore (on any level, again, I happen to know...) but they have that 'look' that speaks volumes! I've spoken to them both on different occasions, and they both have that twinkle in their eye that indicates they are 'into' each other, and both report feeling very loved and special. I also happen to know they had a great sex life, and must miss it terribly at times, but people certainly can see they are more than roommates!
Being the LD spouse, if my dh stopped acting sexual towards me in every way, I think I'd feel like there was someone else in the picture, or that something was wrong in another way. I'd soon be upset, but probably not overly 'horney'... perhaps feel unattractive?