「Head, sliding down」with「painful condition, stabbing pain」as the BIRTH PROCESS, with the newborn as yet PURE or other LIVE animal resembling a chunk of RAW meat, often blood-spattered.「Head」of a「prick」as RAW, ALIVE, or perhaps as the source of human LIFE at least from the male perspective. Note that the glyph meaning「to eat raw and alive」(鴨) also means 'sucker, male prostitute.'
　Elements could also be「herd meat assets」merged with either「array, line up, rod」or「screwing」to depict the LIVE RAW LIFE of a VIRILE lord and his harem, and the inevitable BIRTH PROCESSES that followed.
　Most folks today would not think that「person prone within soil」is necessarily alive, but instead more likely the opposite as the living dead (an oxymoron? moving, yet not truly "living")—nevertheless, the same elements as「person horizontal and screwing with rod」or even as「rod head sliding in feces」are also suggestive of the RAW LIFE of a VIRILE lord with his chickie-boom-boom harem.
Moreover, many folks today indeed think that「prone within shit」adequately describes the LIFE of a person, with some research suggesting this is the case for three-fourths of humanity today. Who can guess at what the percentage was in dynastic China thousands of years ago, with women being sold as sexual slaves having pulverized feet, and virtually all the males working as serfs for the lord? Are we again talking about the 1%ers living above the rest of us? One lord to ten thousand serfs was more likely. It is no wonder that today we have aphorisms such as, "LIFE sucks. Then, you die." Is this the common human response to increasing knowledge of risk and danger, the sense that the rules for survival no longer guarantee a good life, the commodification of all value, and that life is increasingly lived in a state of tolerated panic, with an ever worsenlng future awaiting us on the horizon in just a few short years (or, less)? Apparently. So, what does keep life going? The「head on a prick」no less. Further note that the English term "sucks" when used as a descriptor of an inferior or low quality condition derives from the nastiness associated with the forced drawing of fluids into the mouth by movements of the tongue and lips of a service provider that create suction on the「head of a prick」and in particular when the client presently has a dose of the clap. It seems that these elements can be used to describe the initial copulation, birthing, daily life, and even death as all stages of what we consider to be a LIFE.

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: to be born; to give birth; life; to grow; raw, uncooked
Japanese: vital, virile, lively, innocent, naive, unsophisticated, inexperienced, green, wet behind the ears, birth-, pure, undiluted, raw, crude, life, living, I, me, myself, uncooked, fresh, natural, as it is, unedited, unprocessed, unprotected, unpolished, impudence, sauciness, to have a child, production, bringing into the world, to give birth, to deliver, to produce
Unihan extended: life, living, lifetime; birth
EDRDG: life; genuine; birth

Used within names (nanori)
あさ　･　いき　･　いく　･　いけ　･　うぶ　･　うまい　･　え　･　おい　･　ぎゅう　･　くるみ　･　ごせ　･　さ　･　じょう　･　すぎ　･　そ　･　そう　･　ちる　･　なば　･　にう　･　にゅう　･　ふ　･　み　･　もう　･　よい　･　りゅう