Hyacinth has simply got to have it. She is reduced to working herself into a lather of repressed sexuality on the organ and now that is the only way she can get the release she needs to function as a fully liberated woman.
The scene that Rose walked in on in her sister's house with her Brother-in Law and the babysitter was not appropriate for mixed company. She decides that he needs proper punishment for his cheating ways and she might scratch her itch at the same time.
Betty never thought the time would come when she would be bending over for a dark-skinned macho male and taking it all the way up her back door with a black salami stretching her to her maximum limit. It didn't seem righteous that she would be surrendering her feminine dignity to a man of color at a time when she was becoming less in favor of diversity when every thing around her was becoming more and more liberal and progressive.
This should perhaps be more accurately described as speculative fiction regarding the near future of the medical field. With everyone growing up with the internet and generally much more exposure to sex and nudity, I expect that a number of factors will result in a lot less bodily modesty and greater acceptance of public nudity and sex. And the economics of the huge expense of modern medicine may force a lot less concern for privacy.
Neglected! What is a poor housewife to do? This one discovers the perfect solution to husband's indifference is to take advantage of every male guest to knock on her door.