「Soiled with orifice and cloths」: a LONG ROBE would naturally trail in the dirt…a robe long enough to cover one's ass might also become soiled by dirt emitted from that orifice (「one arrayed pitifully」一 and 哀) in brown stripes, assuming no other loincloths were in use.
Modern elements seem to be「soil(ed) orifice」atop「head in transformation」suggesting a ROBE or LARGE FLOWING CLOTHING would be in order to conceal the poultice and other gadgets used to treat an infection. Also「clothes for accessing the orifice with night soil」: a ROBE.
By extension, SPACIOUS as in big, wide, unfettering clothing that allows gorging for hours and defecating or urinating (「soil orifices」) while still seated at the table, or in other words, the eating habits of the upper class nobility. Seats had cutouts to allow urine and feces to drop into pots that were also handy when forcing regurgitation as might a bulimic, all designed to enable royals to continue feasting without getting up from the table…for example, in England:
「There were four to six courses, with seven to nine dishes in each. For big occasions dishes often included cod with oyster sauce, ballotines of duck in Cumberland sauce and roast lamb. There would be a dessert course, with dishes like chocolate profiteroles. A buffet of hot and cold meats was also kept on a sideboard during the meal, just in case you got hungry between courses.」
[ link now-dead was https://www.bbc.co.uk/news/magazine-16659349 2012-08-09 ]
Who could eat like that, and not repeatedly dump, piss and puke? if you left the table, you missed out on some of the courses, and leaving the presence of the royals was considered rude…you want to be invited back, right?
However, examination of old glyph forms reveals that the topmost element was also a merging of「penis」with「orifice」(吉) and not「soil, dirt, the ground.」「Clothing」with easy access to the penis and buttocks or other orifice is clearly a ROBE (a style that would make it the clear favorite of the aristocracy, but today, think 'bathrobe'). In other words,「clothes ideal for getting lucky.」Concubine court females of the emperor wore FLOWING ROBES, and so would「clothing for penis with orifice」refer to LONG ROBES that do indeed provide easy access to all portals with minimal recovery time upon discovery by others. Note that as an element in other glyphs, the bottom-left area strokes may be modified slightly. Also note that「clothes」as an element is often split into two parts, and if dragging incredibly expensive clothing in the dirt or along the floor by royalty seems stupid, you are correct…but, they still do that.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: long robe (old)
Japanese EDRDG: long kimono
Unihan extended: robe