Cocoon

When he was young, he used to watch those fat green caterpillars moving slowly along the adobe fence, near the tall fruit tree in the side garden. He was curious to watch how slowly they moved and how fat they would get.
On an occasion he would even tap them and hold them, but their tiny feet were a bit itchy on the skin. Once he even poked one of them with the spine of a broomstick (used too to clean said garden), black substance started oozing out of its body and it eventually curled up. He always wondered where those green caterpillars went, so he went to investigate. It turned out that they were all heading for that tall fruit tree to spin their web that made up a cocoon. So again out of curiosity, he climbed the tree and plucked one out to find out what they were doing in there. Shaking it, tossing it and eventually cutting it open. What he saw was a strange alien looking stiff creature, that was very dark brown. It had underdeveloped wings, head and torso. Later on he learned that that was the evolution of a moth that eventually would cut its way out and metamorph to become a multi-colored flying accessory to that said garden.
So in human ways, cocooning is a way of hiding until one can come out looking much better than he/she once looked. Examples of human cocooning a.k.a withdrawing from society:
Cover oneself in a thin blanket followed by a thicker one (depending on the outside temperature, leave a small opening so as to allow breathing of fresh air).
Do not eat, do not bathe. Curl up in the fetal position and drink fluids, if possible through a straw.
Only come out for very short times to do your bodily functions.
Keep your hand between your thighs (to keep them warm) wear thin socks, do not answer phone calls, do not agree to ANY kind of invitation to do ANYTHING and just ...think.
Advise to co-cocooners: make it a maximum of three days, or you may never become that necessary accessory to that garden .