The lavatory contains a long trough for which the knights can use for urination. Crude toilets are also included for defecation. The design is all stone walls with candles, and no privacy walls.
Lavoratory, Inside Castle
knight
king
I am a king of the whole empire. I give rules and pursuit them. I am brave and fearless.
Hello Sir Knight, are you hear to guard me during my evening urination? I would assume you to be safe in here my lord. Thank you, I shall feel much relief with you at my back while I relieve myself. I am glad to hear that my king, perhaps I should also relieve myself. Please, help yourself - but keep one hand on your sword at the ready. I will be sure to do so my king. Well, I must say - I feel much better now! I trust it was a satisfying wee? Oh yes!  Quite.  And yourself? It seems it may never end, too much drink. Time to return to the tavern, and fill up then! I should accompany you...for protection of course...