Yeah, probably. It is also always vaguely embarrassing for me to read fiction where an author clearly wants to write kink, but doesn't seem to realize it.

And I am always baffled when that happens with any of the "BDSM" type of fantasies, because the major ones are all such a common set of kinks, and not hard to realize even pre-internet. I mean when I was a wee baby-RatCreature in those pre-Internet days I realized what kinds of (all vaguely disturbing, but hot to me) kinks appeared in my fantasies way before I had any attraction to specific (kinds of) people, and it was far more consistent. Actually the same kinds of fantasies only evolved into explicitly sexual ones with puberty.

But I mean, when I went looking for written porn as teenager before the internet was around, I obviously went to look to find a paper copy of De Sade's Justine because it was the famous work, and then alternated between "yes, this!" and "ick, no!" depending on the details. Anyway, considering this kind of fantasy is pretty much the most famous kind of porn around since at least the 1800s, it can't have been hard to realize what's going on with your ID even in the 1960s.