They are good in and of themselves. Procreation is to rare for them not to be. Companionship is good in and of itself. This orientation toward an end is classicalism run amok, coming from stoicism and the idealism of Plato toward sex, which likely reflected his Asexuality which infected the entire field. It is perversion.

Jesus never talked means and ends. It is time to unbaptize classicalism, especially when it is based on an undercurrent of sexual exceptionalism (asexuality).

CS Lewis is not doctrine. By the way, literature is one of those things that is good in itself. No end required.

Do you have a reason originating with Christ that does not depend on sexual proclivity of celibates and/or asexuals? Does it stand on its own if I do not accept a common premise, which is my right in a logical arugment? I kind of doubt it.