Cliff Notes for skipping the sex scenes in A Rational Arrangement

There aren't a lot of sex scenes in the book, relative to its length, but what sex scenes I did write generally establish some points about the characters and the nature of their relationship. For readers who want to skip them, the relevant points are behind the cut-tag in this entry. This bit is cut-tagged because it's implied rather than spelled out in the erotica scenes, and some readers may prefer figuring it out on their own. :)
( Plot-relevant details without the explicit content! )