What's This About?

About a year ago I was reading a review of a book titled “At Day’s Close: Night in Times Past”. The reviewer began with these comments:

A man has written a book about the night. Well, why not? In the past decade or so, we’ve seen books on pencils, bookshelves, tobacco, cod, salt, spice, blood, bread, caffeine, crying, the penis, the breast, boredom, smiling, the hand, and masturbation.
...
If it seems that any noun in the dictionary can be tricked out as a book these days, it’s because the minutiae of daily life have acquired some intellectual capital. Good microhistories do brisk business because they see the big picture in the smallest details, offering the hope that everything under the sun has meaning.

And, I began to notice many such books. I'd actually read a couple of them already: Cod, The Chicken Book, Salt. And I thought two things: 1) All the good parts/nouns are being snatched up and 2) Might be some opportunity for parody here.

So: my tome - "Sphincters: The Ring Muscles that Shape Our Culture".