It is classic theme of the re-separation of the sexes in some dystopian future. Rick and Morty tackled this Sci-fi staple with a new level gritty honesty. Of vexillological note is are flags on the 'male' side of the planet where, a spartan design of alien who kinda' looks like Dr. Rick with brownish orange triagle on the bottom that the wider at the hoist and comes to point at a ripped fly. This seems to be a unique flag where by the fly end is purposefully ripped, as its design.
The planet is called Gazorpazorp. Robots are used a breeding chambers were he burly red protein coated men pollinate their species. The men are totally unaware that the females of this planet are hidden away.
Here is a close up of the 'Male Gazropazorp' flag. Notice that the eyes are closed, the hair style is similar to Dr. Rick and the fly is ripped, on purpose.
