Mason & Dixon by Thomas Pynchon

Literary historical novel following astronomers Charles Mason
and Jeremiah Dixon from their 1761 transit-of-Venus expedition
through the surveying of the Mason-Dixon line in colonial
America, narrated in eighteenth-century prose with digressions
on science, slavery, empire, and folklore.

This book’s main concerns are; animal cruelty/neglect, BDSM,
controversial and inflammatory religious commentary, dubious
consent, explicit sexual nudity, gore, kinks, fetishes, patently
offensive sexual content, pornographic material referenced,
prostitution, prurient behaviors, sexual and reproductive
exploitation, sexual activities, sexual dialogue, slavery, and
violence.