
So the tip of the urinary catheter is inflated with normal saline (fluid) like a balloon in the bladder, that's how it's able to drain urine! To remove it you have to deflate it first by using a syringe to pull that fluid out then you pull it out! You can't just pull it out like he did that would be painful

The fact that more often than not the one who get catheter are elderly... Imagine elderly react like that when you take out their catheter.
That scene in fact does not sit right with me.
But hey, yaoi logic, and I'll just think it's Gunmu moaning out of embarrassment instead of a lil bit of pleasure.
I'm at ch 50 and teo removed his urinary catheter like that? I'm a nurse and I couldn't believe my eyes LMAO