「Juxtaposed orifices screwing」will likely be near enough to hear one another's intestines 'growling' (so-called 'stomach growling' in English, perhaps a misnomer). Strangely, many people (not all, and not always) experience growling intestines, unrelated to hunger, just before and at the commencement of sexual activity with another person (that is, not self-induced sexual activity), depicted with the elements「wish becomes true, harmonize, meet together with another, grant one's desires, win the favor of another」with「orifice.」…speculated to be caused by a release of the hormone motilin by the small intestine as a response to anticipatory anxiousness, but no one seems to know definitively. Motilin clears the gut by stimulating peristalsis, perhaps as an adaptation that precludes regurgitation during intercourse.「Female-female relations screwing」confirms the results of a modern day Internet search that reveals 'stomach growling fetishes' are most common among females who prefer females, although the borborygmus phenomenon at the start of sex is not exclusively associated with women.
　「Mouth old」may suggest not having eaten anything for a while. Sounds that are「twisting through an orifice」or body cavity:「A stomach rumble is a rumbling, growling or gurgling noise that occurs from the movements of fluid and gas in the intestines (in the vicinity of but not actually within the stomach). This process occurs in some animals, including humans. The sound occurs when gases in the body flow through the small intestine. As waves of muscle contractions move foods and gases through the digestive system, the food is pushed against the intestinal wall, which induces the noise. The process of these contractions is also known as peristalsis, which is the ultimate cause of the rumble.」
　　[　https://en.wikipedia.org/wiki/Stomach_rumble 2013-08-14　]　
　「Orifice that is old」is one that may not be in demand any longer, not like those younger ones still as juicy as freshwater clams anyway, so that the person with such an「old screwing orifice」may often be going hungry, suffering from BORBORYGMIC hunger-based stomach growls and grouchy MURMURINGS while jealously recalling past heydays.
　And strangely, apparently the stomachs of some folks growl with BORBORYGMI noises in particular when sexually aroused…imagine that coming from the person standing in line behind you, but a good sign when on a first date, perhaps.

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: (onom.) for the sound of a bird, an empty stomach etc
Unihan extended: mumble, mutter, murmur; rumble
EDRDG: mumble; mutter; murmur; rumble