Your #9:
Yes, in my experience, sexual relations is a necessary, mutually rewarding activity in which we still engage. Not as frequently as it was, once, but enough to be also mutually satisfying. I love her more today than on day one, and the fact that her hair is white instead of brunette, and that there are a few wrinkles we both have is no retraction. I do not discount that relative age makes a huge difference as long as both partners agree on undsestranding that difference in age does mean that activity for the older pruner will slow to a degree, and that more than sex is going to have to carry the load of continued compatibility.