「Erect penis in orifice of spread legs with streaming, getting lucky in spread legs with erection」represents when an animal was in season or in heat, known as estrus, the selected day for copulation and calculating ovulation. Some fonts display inner element as「time and time again on rod with orifice」rather than「penis getting lucky」but the effect is unchanged…most species tend to copulate repeatedly when a female is in estrus.
The ESTROUS CYCLE of many farm animals is an average of 20 days, or one ten-day period to ovulation and another ten-day period to the start of the next cycle. Counting and tracking these ten-day periods for each animal was important to farmers and herders in order to increase the chances of conception, and personally to fully enjoy the fruits of animal husbandry. In China, each month was comprised of three such 10-day periods, generally (the so-called Chinese ten-day「week」).
An「erection」with「gasping, tense」(and in Chinese,「no-longer-integrated foot」) as WRAPPED ALL THE WAY AROUND, the PERIPHERY and GIRTH, with either「night soil, feces」or「two-handed, twice on rod」(Japanese fonts. No no-longer-integrated feet) or「penis」(Chinese. Varies by font) completely inside with「orifice」as「getting lucky」: FULL CYCLE, the ENTIRE CIRCUIT, hitting every base including the 'night soil orifice.' Another strong possibility for these elements, and conception during estrus, is simply「penis」(士) inserted fully into「vagina」(冋) with the vagina's「spread legs」element merging with「erect」as a variant, and this combination also supports the meaning of GIRTH, and human LAPS of both sexes too for that matter, although a full circle LAP is the common understanding by traversing all the way around something and returning to one's starting point. A Chinese service provider's LAP was perhaps from one no-longer-integrated foot to the knee, into the groin orifices, and then continuing on to the other knee and no-longer-integrated foot, arriving at the starting point. Once again early bonobo-humans performing the entire circuit of getting lucky within spread legs, an erection gasping with no-longer-integrated feet, orifices, and fecal matter, known as a HOME RUN, or RUNNING THE DIAMOND with both legs bent at the knees while holding both no-longer-integrated feet on one's batting wood.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: week; weekly; to make a circuit; to circle; circle; circumference; lap; cycle; complete; all; all over; thorough; to help financially; Zhou Dynasty (1046-256 BC)
Japanese EDRDG: circumference, circuit, lap
Unihan extended: Zhou dynasty; circumference

Used within names (nanori)
あまね　･　しゅ　･　す　･　ちか　･　のり　･　ひろ　･　びび　･　まこと