Elements as「rod with buttocks and grand, two-handed and taut, many」as TO RETURN AND DO IT AGAIN seems to need no further explanation, or at least it did not back in the days of dynastic China.
　Chinese meaning of TO TWIST AROUND backwards, something a dog does often, such as when it RETURNS to inspecting or sniffing its own anus, or licking its genitals, or when another dog approaches and begins anal sniffing (that sort of thing)…noting that「return」literally means 'to turn again, to go back to where it started.' Original Chinese paired this element with「dog」suggesting the RETURN TO some sort of activity with a「rod with canid buttocks」if you can imagine that, as SHOWING NO PITY, MERCILESS.
　A「dog always RETURNS to its VOMIT」(this is an old saying in English, too), REGURGITATION. And vomiting can involve TO TWIST AROUND one's head to one side or the other while vomiting in the effort to direct the gushing chunks away from bystanders or one's own trousers.
　Some have suggested「door big」that makes little sense unless you make-believe that a big door must always swing back and RETURN TO its original position, but this interpretation is both incorrect (big doors in fact do not always return to some original position) and ignores other meanings along with the original element of「dog.」
　Chinese equivalent 戾 meaning the inspecting or sniffing of an anus, which if done by a human being to another animal (human, bitch, ewe, sow, and so on) leads TO VIOLATE, to be RUTHLESS with no pity, no repentance, no remorse, no compassion and behave as does a TYRANT (a cruel king or lord, 鐵).「Male dog」inside「buttocks crack」should need no further explanation as SHOWING NO PITY, MERCILESS, a violent human dog at a buttocks crack, taking what he wants and having his way with a rectal fundament, most certainly a redundancy if there ever was one.
　Nevertheless, when a pack of canids (wild dogs, wolves, jackals, foxes, dholes, dingoes) begin devouring a carcass, the animals begin fundamentally by tearing open the place easiest to access with softest tissue and where a boneless hole naturally occurs: the anus. Then, usually gorging as much as possible only to RETURN HOME to their den and DISGORGE, VOMIT chunks of meat for their pups to ingest. Canids are extremely intelligent and clever pack hunters, stalking prey while SHOWING NO PITY, MERCILESSLY attacking. Deaths by wolves are notoriously difficult to investigate by human authorities when a person has been reported missing because no body parts can be found, no bones, no pieces remain, not even small ones…just a splotch of reddish snow or mud, perhaps. RETURN and RESUME feeding until all has been devoured.
　A human being with「two hands in buttocks crack」may well be inspecting or sniffing his or her own anus or that of another person of course, TWISTING down to get a better look and smell while suffering from an infection or an infestation that continues to RETURN and RESUME its due course WITHOUT MERCY.
　Modern Japanese glyph of「doorway」with「big, two hands」and depending upon the font used to display the glyph. Also apparent that the top element is also「buttocks crack, rod with buttocks」as a doorway for entry, and not simply a「door」that you might encounter for entry into a room. If glyph refers merely to a「door」then perhaps this depicts a「dog」RETURNING home to「your door」something dogs can do even over incredibly long distances and time, or, RETURN to an「anus」for more sniffing…dogs certainly have a strong affinity for RETURNING TO and resuming the sniffing of another's buttocks hole (do not blame the animal: they use these scents to identify each other, and you, and also to sense danger, or illness).

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: Japanese variant of 戾; to twist back; to return
Japanese: returning, giving back, to put back, to return, to give back, to restore, to turn back, to vomit, to throw up, to recover, reaction, recovery, to go back, to rebound
Unihan extended: perverse
EDRDG: re-; return; revert; resume; restore; go backwards