Some suggest「repeated rice grains in wet paddy」may indicate the SEQUENCE for planting fields, but unfortunately rice grains per se are not planted in flooded rice paddies—first, rice seed grains are sprouted within small trays of soil, then established and growing rice seedling plants are transplanted by plugging them into the bottom muck of a paddy, with the green shaft extending above the water line…also again resembling「green gonorrhea shafts discharging into a slurry-filled cavity」(there seem to be so many euphemisms and analogies in Chinese glyphs).
Alternatively, as「sniffing the odor of rod emissions」「able to distinguish and recognize the difference between clean emissions of semen and those with gonorrhea within screwing orifice」as something that must be performed with any FOREIGNER prior to physical engagement ('foreign' in this case means anyone with whom you have not connected yet, perhaps even those of one's own village, i.e., a new partner, and not only Mongolian goat herders who may have been roaming in China), and PERFORMED IN PAIRS, TAKE TURNS DOING IN SEQUENCE verifying a clean smell before any sexual activity begins: to BE ON GUARD at all times.
「Distinguish between the plugged orifices」or「repeatedly bobbing head」with two different orifices, one「puckered」and the other「naturally closing.」Clearly, as most sexologists will advise still today, if copulating male and female humans have the inclination to engage in alternative intercourse during a single session, there is an obvious ESTABLISHED SEQUENCE for doing so, as double-dipping in the reverse order can cause severe health problems for the female afterwards. In Japanese, also meaning ON GUARD since the female in particular will likely be WATCHING ON GUARD to prevent access out of sequence, and in some case actually scooting her asshole out of the line of fire as the ARROW FITS INTO THE NOCK, causing a BOUT, WRESTLING MATCH to ensue (…imagine that). Moreover, females also were the ones watching the seedlings and managing the fields while the males were off 'hunting other meat' or tupping ewes (per other glyphs meaning 'rural' and so elegantly portrayed by the Markey Moose Club in the early adult-oriented film classics「Fleece Blanket Bingo」and「Where the Sheeps Are」and so on). Perhaps the source of the English expression 'to nock up, nocked her up', by placing the arrow (矢) in a position ready to fire a discharge, often misunderstood as「knock up」although that spelling is marginally appropriate in the circumstances.
In Chinese, this glyph refers to any non-Chinese ethnic groups, as「repeated bobbing head splats with puckered plugged muck orifices」or「gonorrhea-spurting assholes」as some fairly overt racist name-calling, but then there were no politically correct rules to be followed in the old days, and it was all good for laughs…hey, let's face it—everybody the world over was racist until the political correctness movement of late 20th century, although some may not be old enough to know this historical fact.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: foreign; ethnic groups from outside China; (when used after a verb) times or fold; classifier for the number of iterations of an action or deed etc
Japanese EDRDG: turn, number in a series
Unihan extended: to take turns; a turn, a time; to repeat

Used within names (nanori)
は　･　ま