When I was a kid, I found my way to receive deep pressure:
There were 4 mattresses under my bed and I went lying between them regulary (up until teenage years and then I got a new bed and mattresses disappeared).
I started to squeeze between a cupboard and a wall.
I also wanted my older brother to lie on me for me to receive deep pressure.
A few years ago I read about Temple Grandin's deep pressure machine she has built herself and I understand.
I have no pressure vest as I do not have a lot of money apart from what I need for rent and food (I am on disability) and I cannot afford the cost of a deep pressure vest.
I usually sit most of the day very tight "interwoven" with my legs up on the chair's seat and my arms around it, supplying deep pressure to myself.
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English is not my native language, so I will very likely do mistakes in writing or understanding. My edits are due to corrections of mistakes, which I sometimes recognize just after submitting a text.