Reasons to rest assured putting things on the knees

Is there anything relieved when placing a cushion or bag on the knee?
Because it relates to serotonin, a substance that gives a sense of security.
Because serotonin is secreted stably by good movement of the intestines,
Place cushions and bags on your knees and feel relieved if you keep your stomach warm.

Hiijii (ひーじー) is a cushion that you can put on your lap and warm your stomach when you feel uneasy and feel relaxed even if you do not have a mental illness.

https://camp-fire.jp/projects/view/13564