secret room (the altar room)

[Lost King]

I was just playing the game and came across that hooded guy in a weird room. The room seems to be a funeral lobby (maybe?) With a warp corpse in laying in a altar. This is the dialog with the hooded man:

"The altar has called to you as well"
"We are humble Servants of Bekatua, protectors of His will."
"You wear the mask of the betrayer, but I suppose it does not matter now..."
"If you want to know how this ends you must speak to the interlopers."
"Pulled in so long ago, but have done so much damage... not their fault, of course."
"There was three of them. One lies on the table here."
"The other two are still out there, likely eternally lost in a hell of their own making."
"Try the one locked in the latrine."
"Yes, that one will be more willing to speak at first..."
"Find the latrine. The door will be open."

Is this a rare event? What is a latrine?
Hoping you guys can answer this

[Dazzle]

A latrine is a toilet

[Taberone]

the latrine is one of the misplaced chambers
I keep seeing it in my runs but never the altar
I presume seeing the altar will unlock dialogue w/ the guy in the latrine

[hernansal7 civilnetworks.net]

Please, if you get any dialogue from the bathroom guy, please post it. Looking for the lore in this game but because of how the rooms are randomized, it would take days if I just played it straight and even looking at 12 hour playthroughs only a little is found out

[Lost King]

This is the complete dialog for the bathroom guy:
"Heh..."
"You know, we didn't wish to do wrong."
"We were doing what we thought was right. We had to be."
"But you... you lead us astray. Not you, but... you know what I mean."
"How could we have known the outcome? How could we have known what would happen?"
"This place, this paradise... it has consumed us. And it continues to consume."
"You'll need to speak to the other one. In the motel."
"He knows how to get there... if you want to see what we've done."

That unlocks the room to the motel guy and you need to speak to him to get the secret and final gun to unlock.

His dialog:
"At long last someone has come to provide me company..."
"That thing has poisoned my mind. I cannot escape, I will never be free."
"It is too late for me. For all of us. We have committed too grave a sin."
"I tried to run, but no matter how I went, I always ended up back here."
"Trapped in this room, unable to leave. Unable to die."
"..."
"I know why you've come to me. You've spoken to the others. You want to see Him."
"If... if you stay with me for just a while longer, I'll direct you there."
"Please, just a small reprieve from the solace."

(Stay in his room for at least 20 seconds to get his final dialog)
(WARNING if you talk to him after waiting. Your playthrough will end so if you want to keep playing, then just don't talk to him and leave the area)

"Okay... thank you. It is nice to have another living soul here, just for a little while."
"When you walk out that door, you'll be in his chamber."
"You can see the sin we committed..."

Leaving the room will send you to a dark area with a single pillar and a dead giant snake and on the floor is the secret weapon, The Firearm. Grab it and you will die, ending your playthrough. And even if you don't grab it there isn't a whole lot in the area anyway and you are stuck there until you reset your game or you grab the gun.