Needless to point out perhaps is that「sticky fluids flying in all directions with copulation」is a symptom, sign that the session is nearing an end. Further,「sticky fluids in all directions on erection that is bent and curled」is a sure SIGN and SYMPTOM of serious illness and a bad OMEN, especially if copulation has not yet commenced (better run and hide, too).
　「Emissions in all directions」with「copulation」: in dynastic China, highly-valued and expensive concubines as sitting persons with no-longer-integrated feet were used as live meat for sex (not being very useful for much else), and becoming pregnant was perhaps one of the worst situations for her and her owner/lord/master. Although females can, humans as primates normally do not engage in coitus while anestrus such as during pregnancy, an OMEN of future birth. Pregnant bellies continually enlarge and harden until the amniotic fluid bursts. Generally, a harem could be categorized into「two states for copulation with concubines」as those with SIGNS OF PREGNANCY or those without.
　Less likely perhaps, elements also as「sticky liquids」merged with「copulating.」The whole glyph resembles a vagina and ovaries, and could refer to the vomit of morning sickness [a sticky liquid], more frequent urination [another sticky liquid], as OMENS, SYMPTOMS of pregnancy:「A few days after conception, the fertilized egg attaches itself to [a] wall of the uterus. This can cause one of the earliest signs of pregnancy—spotting and, sometimes, cramping. That's called implantation bleeding [another sticky liquid]. It occurs anywhere from six to [twelve] days after the egg is fertilized. The cramps resemble menstrual cramps, so some women mistake them and the bleeding for the start of [menstruation]. The bleeding and cramps, however, are slight. Besides bleeding, a woman may notice a white, milky discharge from her vagina [another sticky liquid]. That's related to the thickening of the vagina's walls, which starts almost immediately after conception. The increased growth of cells lining the vagina causes the discharge.」
　　[　https://www.webmd.com/baby/guide/pregnancy-am-i-pregnant 2012-12-25　]　
　Also means ONE TRILLION, one million million, as perhaps an estimated count of「sticky liquids」with「copulating」or, those afflicted with gonorrhea.

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: omen; to foretell; million; mega-; trillion; tera-; billion (old)
Japanese: sign, omen, indication, portent, 10^12, 1,000,000,000,000 trillion, billion, signs, symptoms, to show signs
Unihan extended: omen; million; mega; also trillion. China = million; Japan and Taiwan = trillion
EDRDG: portent; 10**12; trillion; sign; omen; symptoms