[Elements vary by font] FOAM, BUBBLES naturally rise to the surface of a fluid, and that surface with foamy bubbles will「envelop, wrap」the「fluid」beneath.
　Taking note of the various elements individually as well as all the external source references to sex,「combining fluids rejoining with emphasis on concluded contract for services and dripping cooling seduced penis in mouth orifice」describes SPUNKY SPITTLE, whether swallowed or immediately applied elsewhere as a lubricant: depicts the FROTH that forms in the genital region during vigorous and repeated insertions of a「snake-like」object (巳) or「decrepit penis」(己) into the opening of a「foot wrapper」when a flow of fluid is present, the SUDSY FOAM「fluid」when fulfilling a「contract for services with a client.」
　Snake copulation is also a rather foamy, sudsy event due to the open, trough-like hemipenes that snakes are equipped with, making for plenty of semen spillage. Hemipenes are half-open penises, with semen pathways exposed:「A hemipenis (plural hemipenes) is one of a pair of intromittent organs of male squamates (snakes, lizards and worm lizards). Hemipenes are usually held inverted, within the body, and are everted for reproduction via erectile tissue, much like that in the human penis. Only one is used at a time, and evidence indicates males alternate use between copulations as a behavioral means of increasing sperm transfer when the interval between copulations is relatively brief. The hemipenis itself has a variety of shapes, depending on species. Often, the hemipenis bears spines or hooks, in order to anchor the male within the female. Some species even have forked hemipenes (each hemipenis has two tips).」
　　[　https://en.wikipedia.org/wiki/Hemipenis 2014-06-23　]　
　A REASON TO PROCRASTINATE: during ovulation of a female human and estrus of other animals, the individual can become more sexually aroused than at any other time. Adding a dildo and/or an actual penis with enthusiastic action acts just like a kitchen whisk with frothy white discharges whipped up and resembling egg white meringue, mousse, cotton tufts and tassels, or sheep wool:「As a woman's cycle progresses, the mucus secreted from the cervix will change due to hormonal fluctuations. A woman is considered to be ovulating and fertile when the mucus is clear, stretchy and slippery, and looks like egg whites.」
　　[　https://ic.steadyhealth.com/most-fertile-cervical-mucus 2017-05-03　]　
　「Understandably this 'foaming at the mouth' phenomenon has your nerves on edge. But, if you were recently tested for sexually transmitted infections (STIs) and received a clean bill-of-health, most likely the foam-like substance is just a result of the combination of two art forms: The Joy of Sex and The Joy of Cooking. The main ingredient here would be semen…. Semen is loaded with protein, a pinch of sugar, and a dash of salt. The dildo and your boyfriend's enthusiastic 'mixing' inside of you acted just like a kitchen whisk.」
　　[　https://goaskalice.columbia.edu/answered-questions/foaming-after-sex/ 2017-05-03　]　

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: bubble; foam; blister (i.e. skin bubble); to soak; to steep; to infuse; to dawdle; to shilly-shally; to hang about; to pick up (a girl); to get off with (a sexual partner); puffed; swollen; spongy; small lake (esp. in place names); classifier for urine or feces
Japanese: bubble, foam, froth, head on beer
Unihan extended: bubbles, suds; blister; soak
EDRDG: bubbles; foam; suds; froth