Thanks so much for taking the time to reply, I shared it with my husband. Our son is 18, besides autism he was also diagnosed with intellectual disability. He’s non speaking, however, he can say some words. Over the years, we have learned to recognize the signs of him feeling stressed out, he gives a certain look and starts snapping his fingers or asking for water. He also stims when he’s really excited and likes to jump. He still rocks while sitting down.
Have a great day!😁

Good question! There are a few reasons (1 it's a way to get rid of excess energy (2 it's a way to express their emotions (3 when bored, it's a way to keep their brain occupied and focused (4 the repetitive motions helps calm them down when they're stressed.
Hope this answers your question! :D

Hi there! My husband would like to know why people with autism stim? I know there is a lot of information related to the subject, however, you might do a better job explaining.