I say Taylor, because the theorized she is saying that real sex is very gainst the rules (treaty, etc.), while she is being asked to do something secret and special.

Maybe “approaching” originally just meant male/female anal sex with an “only in” restricted woman.

The promenading rhythms I do recall from the homecoming cotillion in 1912??

The very provisional, still weak, working theory here is like this:

LCs originated with very talented, single, literary, alt sex (usually by circumstance, by sometimes by choice) women in the 19thC. Sarah Jane Clarke Lippincott and Mary Clemmer Ames were two of the earliest and most notable practitioners. The combination of their talent, their gender, the discriminatory nature of the times, and their connections paved the way for other women fitting this profile to be anonymously exploited in the back office of newspapers, book publishers, and eventually the military, Tin Pan Alley lyrics writers, etc. As the times advanced, labor and gender equality standards changed, and the “independent press”/muckraker reporter culture became more of a big deal, this covert practice and its history became more closeted and secret. Post WWII it came to be completely taken over by Spook. Small evidence of MI6 using one of these women for a black op in the 1920s is a potentially small little piece in that jigsaw.