The periodic blog postings are all thematically linked to the topic of "menstrual transactions," that is, how men react to what I call "close encounters of the menstrual kind" or interact with women regarding menstruation.  Some of the items appeared previously on "Menstruation Matters," the website of the Society for Menstrual Cycle Research.

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Presently the official blog for the Society for Menstrual Cycle Research is on hold.  However, the 80+ items that I wrote for the blog can be found via the Society’s archive at the following link: 

https://web.archive.org/web/20181028145700/http://www.menstruationresearch.org/author/david/