Generally means to FORM a single SHAPE of many items to match one other as is a PATTERN. Left element「equal thrusts, equal shape on both sides.」Right element depicts「short hairs, fur pelt, pubic region.」「Many strokes of equal force and shape」yield a carved FORM, SHAPE, PATTERN with internal surfaces used as a mold for forming sets of clay-fired pottery dishes, for example. Other such molded imagery can easily be conceived.
「Equal thrusts of equal shapes on both sides of the pubic region」that fits a pattern, perhaps one intended to stimulate the perineum simultaneously from both accessible sides…however, note that most adult human females do not have pubic hairs surrounding both groin orifices, but most human males do indeed have such growth surrounding the anus. In the human male, the perineum is the area located behind the scrotum, between it and the rectum…hence,「equal penile thrusting, both sides with pubic hair」would likely refer to「two male penis buddies」and not being with a female service provider or ewe, generally, with stimulation occurring of the penis attached by its root on the front side of the perineum and with a different penis penetrating into the other, the backside, molding the internal clay-like soil into a shape similar to that on each side. Note that male-female unions are complementary forms, whereas two males (left element) compact the internal soil as does a MOLDED PATTERN having the FORM of stacked fired clay dishes that repeats.
Needless to point out perhaps, but an「array of lower-connected screwing with pubic region」in the same fashion as might be the case with a longer line or circle of daisy-chained participants would clearly create a REPEATING PATTERN, forming the same SHAPE again, and again (see 型 and 尺). It ought to be possible to imagine the PATTERN OF MOTION moving through that line as do muscular contractions of a peristaltic wave, in much the same FORM and APPEARANCE as a tomato hornworm walks (actually, a caterpillar and not a worm, with a single green horn-like appendage protruding from its posterior).

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: to appear; to look; form; shape
Japanese EDRDG: shape, form, style
Unihan extended: form, shape, appearance

Used within names (nanori)
ち