Sounds like a response to deep pressure. Temple Grandin built herself a "squeeze box"/"hug machine" (weighted blankets sound a lot easier, though):
http://en.wikipedia.org/wiki/Hug_machine
Quote:
Hug machine
From Wikipedia, the free encyclopedia
A hug machine, also known as a hug box, a squeeze machine, or a squeeze box, is a deep-pressure device designed to calm hyper-sensitive persons, usually individuals with autism spectrum disorders. The therapeutic, stress-relieving device was invented by Temple Grandin in 1965.
Autism and autism-spectrum disorders have profound effects upon both social interactions and sensitivity to sensory stimulation in persons with such conditions, often making it uncomfortable or impractical for them to turn to other human beings for comfort. Grandin solved this by designing the hug machine so both she and others could turn to it for sensory relief, whenever needed or simply desired.
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