Depicting REAMING or SEVERING A BODY PART that might potentially be harmful or produce results with some「bad influence」as in DIVIDING THE CORPUS…the corpora cavernosa and corpus spongiosum perhaps?「deliberately out-of-reach prick orifice」(meatus) with「reaming」「potentially harmful cuts.」Inheritance of land in the Orient even today is normally passed to the eldest son, and not divided among siblings. Left element depicts the「evil, harm at home to pricks and orifices in a repeatedly painful condition」as a likely reference to spirochete corkscrew demons that often caused a man to SEVER A BODY PART, perhaps the schwantz a little at a time (one-tenth or so) in the vain hope that the disease will stop spreading (too late, though…it's in yer blood, matey).
　It seems today that 1/10 as the proportion of the populace with a sexually transmitted infection is a bit low, at least in the United States of America:
　「One in two sexually active persons will contract an STI by age 25. …Researchers estimate that at least 80% of sexually active people will have an HPV infection at some point in their lifetime. CDC data for 2013–2014 show that about 42% of men and 40% of women aged 18-59 had genital HPV at that time. …About 1 in 8 people aged 14-49 in the U.S. has genital herpes. …Symptoms of genital herpes often go unnoticed. Most people with genital herpes—close to 90%—don't know they have the infection. Globally, researchers estimate that about two-thirds of the population under age 50—more than 3.7 billion people—are infected with HSV-1. Some 140 million people aged 15-49 are infected with genital HSV-1, primarily in the Americas, Europe and Western Pacific. …In 2015, rates of the three most common reportable STIs—chlamydia, gonorrhea and syphilis—reached a record high level. The approximately 1.5 million reported cases of chlamydia represent the highest number of annual cases of any condition ever reported to CDC. …Young people ages 15 to 24 years old accounted for 65% of chlamydia diagnoses and 50% of gonorrhea diagnoses in 2015.」And so on.
　　[　https://oklahoma.gov/content/dam/ok/en/health/health2/documents/std-trends-2015-cdc.pdf 2019-12-04　]　

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: to cut; to cut apart
Japanese: rate, ratio, proportion, percentage, profit, assignment, 0.1, unit of ten percent, match, schedule of matches, diluted with, mixed with, to cut up, to cleave, to cut open, to spare, to use part of something, to have a tattoo in the corner of one's eye, relatively, comparatively, in proportion, to divide, to break, to halve, to separate, to split, to rip, to crack, to smash, to dilute, broken piece, quite, rather, to be separated, to be divided, cooking, cuisine, to be smashed, to fissure, to be torn, to come to light, to be identified, to be established, to become clear, to be worth it, to pay, cleft grafting, crown grafting, splittable chopsticks
Unihan extended: cut, divide, partition; cede
EDRDG: proportion; comparatively; divide; cut; separate; split