Is this not totally normal and very common though? This exact thing happens to me all the time, with some specific memories linked to seemingly random acts like shaving the left side of my neck.
https://www.reddit.com/r/socialskills/comments/hzgm1n/how_to...
https://www.reddit.com/r/socialskills/comments/2nnff4/how_to...
I do it. When i'm alone, and one of those thoughts hits, me, i often vocalise a bit. If i'm in company i just wince (if i made a noise in front of other people when i thought of something embarrassing, that would be embarrassing, so that would lead to a sort of embarrassment Kessler syndrome).
Thank you, this is a genuinely great turn of phrase.
But what I did was tell myself to not react like that again next time. Of course, that didn't work, but it made me notice it better. And after repeating that for some time, I had timely control over the reaction (not over the stimulus that provoked it). If your tic is light and annoys you, you could try that. Your subconscious is capable of picking up more than you think, and it is (somewhat) malleable.