I have always been struck by the Anglo attitudes towards sex.
Must be a Puritan thing that they've misinterpreted since the founding of this country.
The Puritans were definitely a lusty bunch and not shy in the least about sex either.
What they were all about had to do with confounding issues of legacy and legitimacy. (That was never an issue in any matrilinial society, such as those of the Amerinds.)
That's was why theee were edicts about sex within a union and no polygamy, polyandry or polyamory.
They were trapped by their own patrilinial society into edicts of chastity and fidelity.
They were also wrong about half of the time. (The 50% divorce rate came from within, not from wave after wave of barbarian hordes descending from the steppes and "doing the unspeakable".)
Until the nineties and DNA testing, you never knew who your father was (in fact you weren't sure who your mother was,) and either you had to assume all kinds of things, or what really mattered was who really loved you and took care of you.
Its like Québec after General James Wolfe, (he's in wikipedia.) The Québecois were screwed and being deported like the Acadiens (who became the 'Cajuns in Louisiana,) until some of the priests realized that it was a battle of demographics.
So we literally and very lustfully screwed the Anglo back, by lying on our backs (well the women saved Québec) until the 1960's.
Then there was "La Révolution Tranquille" ("The Quiet Revolution") when we were numerous enough to throw the Anglo bosses out of the provinces, and incidentally we also threw the priests out of our bedrooms and the religious institution out of our birth records.
The birthrate in Québec plunged, but people were still having sex.
Its just that the consequences were a lot more pleasant after "La Révolution Tranquille"
This is an interesting series, Lisa. I agree that the mind can be the biggest aphrodisiac and sometimes the mental connection alone can set off sexual sparks. Couples who have been together for a while (without either partner having MS) can have slumps too. So being open to new ideas is important for all couples and there shouldn't be embarrassment or secrecy about the issue(s.) Easier said than done.
I have no tips or tricks except to allow both partners to feel as comfortable and as understood as possible and to be flexible with expectations.