Apparently not everyone has these. I learned about them on an AskReddit thread many years ago. The title of the post was something like "what's something about people's body that they probably don't know?"
I showed the comment about this to my wife and she found she has them. She was so freaked out by their presence that I've refused ever since to find out whether I do.
Funnily enough I've been talking to people a lot about screw types recently. My wife was taking some hardware out of the house and cursing the varied kinds of screws used during installation; a friend and co-worker has been obsessed with the varieties ever since I met him; and my six year old found some of the screws dropped by my wife and asked why they were different.
I've never understood that last one. Assuming I am otherwise physically healthy and don't have any foreign objects in my mouth, I can't really taste anything but neutrality. Technically I can probably taste saliva, but I think my brain filters that out and noting it doesn't seem like it would help anyway.
Unless I'm misinterpreting and I'm supposed to go lick something during a panic attack. I know I've read that biting into a lemon can help.
One good thing about using a CPAP is that I can be fully covered by a blanket and still able to breathe. This occurred to me the other day when I left a bedroom window open during a snowstorm but was too lazy to get up and close it.
I've been told that brain freeze happens because the roof of your mouth detects cold, causing constriction of the blood vessels about your skull. (I looked this up and Wikipedia says it's only a theory.)
Therefore, to combat that quickly, one needs to warm the roof of your mouth. I've gotten mixed results with using the tongue for warmth; I assume that, when it doesn't work, it's because whatever cooled the roof of my mouth also cooled my tongue.
Therefore, if your tongue doesn't do the job, communicate with your partner consuming anything at least a little warmer than the food item that originally caused the problem should help. As the other commenter said, usually a warm drink will suffice, though in my experience it doesn't even need to be particularly warm. I've drunk ice water to help before when the problem was something very cold like ice cream.
Way to sideline things.