This goes into a bit more mechanical detail than the Substack post (which only gestures at "air suction"). I'm still not sure whether there are different urine hose adapters for men and women or not.

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idlewords 4 hours ago | parent [-]

The hose is the same but there are different funnel attachments (the part looks kind of like the cup from a jock strap, and is longer and narrower for women)

	▲	cubefox 2 hours ago \| parent [-]
		Thanks! Any idea why simultaneous operation of seat and hose wasn't possible before ISS/Orion (not sure which)? And why were they able to get rid of the Space Shuttle camera?