Is Birthday Sex Obligatory?

An uncomfortable question, perhaps, but one that underscores many other discussions.

Your life is ultimately a series of chapters (profound), and some people stick around for most of the book — ideally your parents and (once you meet them) children. Maybe some friends. Most are around for 1–2 chapters. That’s a hard lesson of adulthood, but eventually it gets easier.

Well, back in 2009 or so, I helped move my friend into her graduate sch…