「Lapping licking pug-nosed lapdog with loose dripping or head up and in with emphasis」suggests a SINGLE person LIVING ALONE but also caring for a well-trained pet. Formerly 獨 that adds「wrapped with netting」:「beastly pig animal dog」with「rod orifice repeatedly dripping」or「the dog in lap with orifice and loose dripping stench」seem to describe a person who is difficult to live with, or sterile due to a chronically infected condition, and therefore ALONE.
　SPONTANEOUS: some suggest「hairy snake.」…snakes, being reptiles, normally are hairless—mammals have hair. If a snake has body hair, do not touch the snake and instead contact a biologist. One thing's for sure though, it would likely be ALONE, JUST ONE and ALL BY ITSELF. Nevertheless, if the referent of「hairy snake」indeed is a male human penis as some have suggested, then SPONTANEOUS would definitely apply…here's the definition:
　「Happening or arising without apparent external cause, self-generated. Arising from a natural inclination or impulse and not from forethought or prompting. Unconstrained and unstudied in manner or behavior. Growing without cultivation or human labor」
　　[　https://www.thefreedictionary.com/spontaneous　]…that really nails it, eh?
　「Hairy animal, worm, larvae, snake」and so on is the old Chinese reference to Europeans, and in particular the GERMAN or DEUTCH people. Various studies have been performed correlating androgenic body hair to genetically-related groups of human beings, and all conclude that the so-called 'white folk' are the hairiest of them all. One example:
　「H. Harris who published in the British Journal of Dermatology said [indigenous peoples of the Americas] have the least body hair, Chinese and black people have little body hair, white people have more body hair than blacks and Ainu [a non-Japanese genetically-related group of human beings] have the most body hair.」
　　[　https://en.wikipedia.org/wiki/Androgenic_hair 2015-11-15　]　
　While no one has offered proof that Germanic tribes were more hirsute than other Europeans, it is likely the first Germans who visited glabrescent China sported a great deal of facial hair, a thick moustache and beard. Note that today referring to any race of people as「dogs, swine who are rowdy, blamed with loose dripping stench」is considered to be politically incorrect, and may cause offense. So it goes (by the way, most dogs do have a hairy face for that matter).
　「Hairy animal, worm-like insect larva」also refers to a caterpillar, and caterpillars do not share a cocoon. An「animal with two sides」of life may refer to one side as a caterpillar, and the other as a moth or butterfly. Meaning to LIVE ALONE IN A HOUSE, formerly referring to someone old without any sons, again a reference to a「two-sided」life since at first we all live with someone else (perhaps only our mother), but then conditions changed and the person is now SOLO. In Japanese, UNMARRIED…old glyph used「hairy animal parasite」who sucked sustenance from host parents, an adult man living at home with his aged parents and refusing to procreate with human women, eventually LIVING ALONE after his parents died. Perhaps elements of「hairy animal」with「vulva and short leg, snake」may refer to a person who prefers some alternative form as a more 'praiseworthy experience.' Someone whose「snake orifice is loosely dripping」after recent use, or simply infected.

Modern definitions (that generally disregard history) …excluding politically incorrect concepts and other meanings deemed offensive today; may list only pigeonholed definitions, euphemisms, or meaningless mnemonics)
Chinese: alone; independent; single; sole; only
Japanese: Germany, one person, alone, unmarried, solitary, by oneself, voluntarily, spontaneously, automatically, all on one's own, soliloquy, monologue, speaking to oneself, by itself, naturally
Unihan extended: alone, single, solitary, only
EDRDG: single; alone; spontaneously; Germany

Used within names (nanori)
どいつ　･　どっ