HDYLY: 1 Way glass (Scat)
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And as im starting my scat era, the next versions of this are gonna be including an extra scat version too! 
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Anyways, for the commentary about this drawing, Seraphix kinda sucks at pissing and holding himself shut at the same time (Who hasn't been there) at least on this situation he has a nice glass panel on the way to keep all that stuff from spewing out but does give a nice view, also clear piss, someone's been hydrating himself!!

Always found it so cool when others tried to include a scat version of everything they make whenever possible so i want to try to get that vibe too, if it feels fitting then i'll try to make a scat version for it too!