It just struck me, when thinking about purely digital anchors....
Inside Jokes..
If there's a special inside joke you have with someone, like maybe a joke that ended with a certain word or sentence, that there is in a way an anchor to the state of happiness, or hilarity, if you will...
The point of this was that this can also be used in text.
Does this seem logical to you ?
Anchoring arousal to the nape of the neck, e.g. is not an anchor I'd expect would be triggered randomly by other guys, outside the erotic setting.
But of course, if you want an anchor that is unique to yourself only, choosing a less common place would be better.
Placing sexual anchors is something I only do with LTRs. It takes some time to place and reinforce the anchor, and of course to get the time to apply it.
Anyway: If I have anchored extreme arousal to biting a girls neck, and we decide to not fuck anymore, I don't really mind that others may find it helping.
It's not as though she'd complain if she gets horny when somebody plays with her neck, after she's been with me for some weeks, would she ?
(this is the reason I never place negative anchors,... Leave them better than you found them, and all that

)