「Head and neck sliding with erection tense with gasping, rod wrapped in meat」as a ROLE TO PLAY, PIVOTAL, the pivot spot…see 甪 as the replacement glyph depicting a sliding rod with emphasis in the 'top meat' for details, meaning HORNY, a HORN. Something sticking out (one end was 'out' at all times) and PROTRUDING.
　Significantly, glyph seems to represent something resembling a SINGLE HORN, such as a narwhal might display (actually, the narwhal has a tusk, a tooth, and not a horn), inserted at just the right ANGLE in a place where only one horn is possible, not two, for various reasons and circumstances described in the respective paired element when used in other glyphs. Glyphs for animals such as deer (鹿) and moose (麗) with large antlers in fact do not use this glyph as an element, and for a good reason. 角 seems to never have been applied to any animal other than those with a single horn, such as the human male (note the English adjective, "horny" with the vulgar slang meaning of being desirous of sexual activity, in a condition of sexual arousal, provoking or intended to provoke sexual arousal, sexually eager or lustful, hornlike through hardening).
　Elements combine and merge in all sorts of ways within:「imminent danger from head and neck, to a head and neck looking upward」(so as not to endanger the face and hair, if possible) from「rod in meat」or「head and neck erect in tension a long time with gasps, erect upward thrust, and a stream bodily fluids」or「head and neck danger of shortened rod meat」and so on, meaning gored by one HORN, or a「cavity plugged」with a HORN, perhaps one just created within a chest.
　A horn sports one ANGLE (generally). A ROLE to play but not the starring role, with others in COMPETITION refer directly to the manner in which females strut breasts with pride and male herd animals battle with their HEAD BONES, the victor then copulating with all the gathered females in heat, the 'harem' animals in the herd.
　A single HORN that, in most mammals, also contains baculum bone for head facilitating a full erection at a moment's notice, THE HORN protruding outward at roughly a ninety degree right ANGLE (the correct angle, as it were), forming a CORNER SQUARE. Not unlike the English term 'horny' and this element also refer to being SNAGGED or hooked within something, such as a hooker.
　「Imminent danger」of「plugged rod meat or erection with gasps」also describes a BENT, CROOKED BONE or BONER HORN, one skewed at an angle or pulled to one side as a result of disease: scarring from sexually transmitted diseases can cause both a shortened penis and a bent or curled penis, especially when attempting to become erect. Gonorrhea and other such diseases cause scar tissue to form within the urethra:「Peyronie's Disease, …also known as 'Induratio penis plastica,' or more recently 'Chronic Inflammation of the Tunica Albuginea (CITA),' is a connective tissue disorder involving the growth of fibrous plaques in the soft tissue of the penis affecting up to 10% of men. Specifically, scar tissue forms in the tunica albuginea, the thick sheath of tissue surrounding the corpora cavernosa causing pain, abnormal curvature, erectile dysfunction, indentation, loss of girth and shortening. …The disease may cause pain. Hardened, big, cord-like lesions (scar tissue known as 'plaques'). Or abnormal curvature of the penis when erect due to chronic inflammation of the tunica albuginea (CITA). Although the popular conception of Peyronie's Disease is that it always involves curvature of the penis, the scar tissue sometimes causes divots or indentations rather than curvature. The condition may also make sexual intercourse painful and/or difficult…」
　　[　https://en.wikipedia.org/wiki/Peyronie%27s_disease 2012-08-15　]　
　As both an ancient wine vessel that spurted its contents into one's open mouth (the tripod image is the client's three points of contact with the service provider, two knees and a short leg), and as a middle-pitched singing musical note, this glyph relates to its old counterpart 甪, the「head of a rod sliding into upper meat.」

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: role (theater); to compete; ancient three legged wine vessel; third note of pentatonic scale; angle; corner; horn; horn-shaped; unit of money equal to 0.1 yuan
Japanese: angle, square, bishop, third degree, Chinese "horn" constellation, jiao, corner, edge, nook, recess, downstage right, to compare, square nail, square peg, pyramid, square brackets, angled, angular, intractable
Unihan extended: horn; angle, corner; point
EDRDG: angle; corner; square; horn; antlers

Used within names (nanori)
い　･　す　･　すみ　･　ずみ　･　ふさ