I think sex is very
important. If My Man were somehow disabled we would find a way to revamp our sex life so it could go on. I'm a pretty imaginative person. I could have thought my sex life was over (or at least that I was through enjoying it) when my ability to climax became difficult. I could have given up on sex when I was diagnosed with not one, but two severe, chronic pain conditions, a few years apart. But, we changed our sex life to fit our new challenge and it became fantastic.
Even if My Man were totally disabled, I would still have him hold me and touch me while I did what I needed to do to have pleasure. When I've been out of commission, I can still hold him while he jerks off and help him come by simply being in his presence and touching him. There is more to sex than having standard penis in vagina intercourse or even oral sex, one person simply being there for the other
can work. And the hormones which cause bonding in a relationship, prolactin and endorphins etc will still be produced and the relationship will sexually go on well.
Where there is a will there is a way. Even if it is only one partner helping the other come to climax, while LOVING him or her and then the other partner doing the same for the other partner.