Old meaning of「two in mating stance」referred to A HORIZONTAL POSITION as the STANDARD STYLE, the original Chinese meaning prior to using no-longer-integrated feet and other peccadillos, ASSUMING A HORIZONTAL POSTURE when ABOUT TO BE SEXUALLY MATED WITH ANOTHER.「Cooled with mating display」implies that the action has ceased, hence there must have been some degree of APPROVAL, RATIFICATION.
「Two [males] stiffened in courtship display palming prick」to dispense emissions needed for prior approval before screwing to RATIFY each other as CONFORMING TO A STANDARD. One guy doing the act, and then the other guy: QUASI- SEMI- half at a time. ASSOCIATED refers to these two individuals potentially paired but not fully committed to engagement in any joint action with the other yet while awaiting each other's APPROVAL, copying and IMITATING the other's actions.「Standard level」is referring to anything that had met the STANDARD and therefore was PERMITTED, ACCEPTABLE,「good enough」to be CONFORMING for mating and copulation for health reasons.
QUASI-APPROVAL, SEMI-RATIFIED, not yet completed, a prerequisite procedure still in process and used to grant access and to ratify eligibility: describes procedures used among careful and prudent homosexual males by pre-screening a potential sex partner for congealed gleet and infection in order to determine health status compatibility:「congealed, in mating stance palming prick」in a SEMI-completed ASSOCIATION by the first potential male partner palming his own prick until ejaculation, and then the same action IMITATED by the other male. Subsequent association, if any, will depend upon the results and facts of the situation or circumstances, the reaction of one side (a male) IMITATING actions of the other side (a male…most females cannot imitate males specifically in that regard very successfully). In English:「bonobo see, bonobo do」
[paraphrased].
Enabled each potential partner to conduct a full inspection of the other and then reaching a decision mutually,「display congealed schmutz by person palming prick」following the pattern and CONFORMING while IMITATING THE ACTIONS OF THE OTHER. And lastly, the original Chinese meaning of ASSUMING A HORIZONTAL POSTURE when ABOUT TO BE SEXUALLY MATED WITH ANOTHER, …not yet mated, only conducting the initial interview process, the「flows displayed by prick-palming」and so on.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: horizontal (old); accurate; standard; definitely; certainly; about to become (bride, son-in-law etc); quasi-; para-; to allow; to grant; in accordance with; in the light of
Japanese EDRDG: quasi-, semi-, associate
Unihan extended: approve, allow, permit; in accord