Elsewhere: The New Yorker reviews the latest edition of “The Joy of Sex”

On the original edition:

If you are a child of the seventies and were raised on “The Joy of Sex,” you are not likely to have forgotten the illustrations. The woman depicted in these drawings is lovely, and, even nearly forty years later, quite chic. Her gentleman friend, however, looks like a werewolf with a hangover.

On the current version:

[...] what you are left with is something that bears little resemblance to the subversive, explosive original. “The Joy of Sex” redux becomes generic — Cook’s Illustrated with boobies.

I like Cook’s Illustrated.  With that aside, it does make sense.  The seventies were the sexual revolution and an instruction manual would have brought risque, fringe behavior to the forefront.  These days, most of those same behaviors are freely talked about on Oprah, the news, reality TV shows, etc.  There are a lot less taboo sexual subjects these days.