「Orifice with flow ended」and then the GIGGLING starts. An old glyph, meaning SMILE, TO LAUGH, a person is SMILING, face BLOSSOMS. Flowerbuds that spread open are also an「orifice」that opens for the first time when BLOOMING, BLOSSOMING. Note that the analogy between flowers containing a plant's sex organs, the pistils and stamens, and human sex organs as flowering (…or, deflowering) is continued with this glyph, the「blooming of a virgin girl into womanhood」in an aroused, blooming, swelled and brightly colored condition that invariably causes SMILES (or, uncontrollable giggling, LAUGHTER)「orifice with no going back, no returning」in this sense referred to splitting the hymen, a deflowering event.
　「Orifice with big spurting」「orifice of passing through the valley between hills」that in this sense referred to eventual access within the anus, hence also the「orifice with no going back, no returning」anywhere else in the same session prior to bathing.
　「In traditional Chinese medicine, there has never been a mental disease called pedophilia (or an equivalent term), or homosexuality, or most of the other so-called sexual variations for that matter. …Children are usually described as natural sexual beings and erotic stimulation and sex-play are seen as beneficial to their healthy development.」
　　[　https://docx2.com/wp-content/uploads/Are-Any-of-the-Pharaphilias-in-DSM-Mental-Disorders_.pdf 2023-05-14　]　
　「Historical accounts from the 18th century indicate that adult-child sex (particularly same-sex pairings) were an accepted practice in China, Japan, Africa, Turkey, Arabia, Egypt, and the Islamic areas of India (Trumbach, 1977). In 19th century London the going price for a virginal, 12-year-old girl, of good background, was reported to be 400 pounds (Bullough, 1964).」
　　[　https://www.ipce.info/library/journal-article/legal-social-and-biological-definitions-pedophilia 2012-01-01　]　
　See the variant 笑 that uses elements of 'young person in lordosis position' or 'in lordosis position with a young person.'

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: old variant of 笑, laugh; smile
Japanese: laugh, laughter, smile, sneer, sex aids, to laugh, to smile, to sneer, to ridicule, to bloom, to make bloom
Unihan extended: smile, laugh, giggle; snicker
EDRDG: blossom; bloom

Used within names (nanori)
さ　･　さき