What non-stereotypical stims are there?

So, I think one of my stims is pretty unique. And I can't believe I'm feeling self conscious posting about it on a forum with other people who stim...

As a kid I put my fingers or knuckles against one nostril, took a breath in through that nostril, and found a way to create a vibration at different frequencies that mesmerised me. The positioning of the fingers has to be just right and sometimes the other nostril needs to be covered. As a child I did this alongside sucking the two inner fingers of one hand (middle and ring fingers) and used the other over the top to create the vibration. I wonder if this stimulates my vagus nerve like the vibrations of speaking does and helps with the relaxation - not sure, or if this theory is still up-to-date.

My parents took me to the doctor about this as a child - the doctor had no clue what to say! (Wasn't on the radar for autism back then.) My parents were embarrassed by it though, so I was discouraged. Although I do remember once that my family asked me about how I do it and tried to do it themselves! I liked that! My brother always sucked his thumb and bit his nails, so I think they were easier going on me, thinking this was just my version of that. I feel lucky not to have had harsh childhood punishment associated with stimming. 

I've noticed I do this when I'm stressed and the sustained inhaling doesn't actually help relax me, even if the vibration does. (In breathing exercises, often the exhales are meant to be the same as or longer than the inhales because this stimulates relaxation, the opposite can do the opposite and simulate stress/exercise states).

I have figured out how to do this subtly and without making an audible sound, but usually I'm very self conscious about it.

Not quite the same but this reminded me of something I do but something has to be just right & I'm not entirely certain what it is. I manage to hum at a certain pitch that sits between 2 sounds, it creates a double note somehow. When it happens again I'll likely take more notice of it now I've consciously thought about it. 

Hi NotTheOldMe, that sounds fascinating! Have you heard of biphonic or polyphonic singing? I think that might be what you're doing! I always wondered how people do that. There are some stunning songs on YouTube, especially acoustic ones, of people singing like this.

haha, sadly just the humming with teeth barely touching thing.. not the 2 notes thing. I don't know about you, but whenever anyone's watching me do anything I fail abysmally 

haha, sadly just the humming with teeth barely touching thing.. not the 2 notes thing. I don't know about you, but whenever anyone's watching me do anything I fail abysmally