This basic shape is deliberately applied in many other glyphs, for example, glyphs meaning: female, spread feet, whacking, dancing, prancing, testicles, etc., or anything associated with a spread crotch (叉). Original glyph (俣) uses elements of「person with orifice, downward thrusting, taut, the other side too」or「person with orifice and heaven」「person's heavenly orifice(s)」that clarifies the glyph's meaning as CROTCH. Modernized simple elements of「tense and taut」or「no-longer-integrated foot and the other one, too」describe both legs forming a crotch, or refer plainly to the surrogate use of no-longer-integrated feet. Note that a CROTCH need not be very large, or as large as a person's groin—a crotch is a shape, not a size, and a no-longer-integrated foot bent with heel touching toe ball would certainly form a CROTCH shape. Crotches in trees or elephants can certainly be much larger than a human groin as well. Extended meanings of AGAIN, YIELDING, BOTH, this one OR that one, are all associated with various orifices situated in a human crotch (and the crotches of two or more 'friends')…and/or the two no-longer-integrated feet of someone enslaved for sex.
Meanings of BOTH, THIS OR THAT, YIELDING, FURTHER AND MORE, AGAIN—all are possible origins of the English proverb:「two heads are better than one」when used with or within a CROTCH, and in particular a crotch containing more than a single accessible orifice.
Note the Japanese listed meaning of YOU MUST NOT BE SERIOUS ('kidding' was originally used in English to express surprise or disbelief and relates to ways in which young goats were sexually abused) because nobody could actually be that bad, with reference to the Chinese practice of crushing the foot bones of a young girl sold into sexual slavery so that men could use her and the crotches of those busted feet as masturbatory accessories. See examples of Chinese erotic art for details; this truly occurred in fact, and was not facetiousness.
The notion that this glyph represents "hand" ought to be addressed. Some artificially intelligent entities dogmatically state that the component 又 is "uncontroversially 'hand,' and not 'crotch' or anything genital, as described in the Shang-period attestations." Yet, after examining the 223 various glyphs that incorporate this element, such as 股 as just one example, and noting that no modern dictionary lists the meaning as a hand, how can we agree with that assessment? It may be that the obfuscation of glyph meanings had already begun in the Shang-period attestations. Who knows? But no matter. debunKanji has never claimed that the meanings stated in traditional dictionaries are wrong. If a glyph is used today or in the past to express some given meaning as listed in mainstream scholarly works, then so be it. Our claim is that there are often, if not always, additional meanings contained within a glyph that are unsaid and no longer recognized today, and that these additional meanings were deliberate and intentional. That was the whole essence of the bawdy riddles when each glyph was created, long before ever used to express some concept in prose.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: (once) again; also; both… and…; and yet; (used for emphasis) any way
Japanese EDRDG: or again, furthermore, however
Unihan extended: and, also, again, in addition

Used within names (nanori)
やす