A Serious Posting

This topic is a bit odd for this blog, but the question has been posed to us, and we'd like our readers' input. Please comment if you have insights that we lack.

In the Spencer W Kimball manual, chapter 17, page 183, the third paragraph from the top (footnote 11) discusses the relationship of husband and wife and presents a bit of phrasing that has us stumped. Since we're in nursery, we missed (or were fortunate to miss, depending on how the lesson went and who was teaching it) this discussion in RS and Priesthood. But the word "indiscriminate" has us wondering. What could this mean in the context of marriage? Isn't monogamy by definition discriminate? Is there something here we're missing or misunderstanding?

To delve a bit deeper, I looked up the source of the passage. It's the First Presidency message from the October 1975. As anyone who's read The Miracle of Forgiveness knows, President Kimball's views on morality are simultaneously outspoken and occasionally cryptic, and the historical context of the 1970s is important. Since I was not aware of the social movements of that era (finally, I get to feel too young...), the thoughts of our more mature audience are especially appreciated. What was going on in the middle part of that decade that might explain what this means?

Any input from our readers, via comments, email (you've got our addresses), and even phone calls would be illuminating. It probably goes without saying that we don't want this blog flagged for "adult content," so let's be pretty general (no personal narratives, please!), but your insightful and careful thoughts are welcomed. Thanks.