The things Salad Fingers says into the toilet and what the other Salad Fingers says to the first form at least part of a conversation when put together. When put together, it follows as:
First S.F.: Jeremy Fisher. I thought you were out fighting The Great War. Second S.F./Jeremy Fisher(?): Pardon? First S.F.: I'd like a word with you. Second S.F.: I don't understand. What is this? First S.F.: I'm not one for accusations, but this one's CAST IRON. I've seen you tailgating my daughter with aspirations of deflowering her rose. Second S.F.: No! This isn't true! You've got the wrong bloke, squire! First S.F.: I don't make mistakes, comrade. This one's textbook.
Salad tells Hubert that Glass Brother was raised under the "Beast's sun" and it should be worth noting that Salad couldn't pass through the mirror portals during the day. After Hubert is taken by Glass Brother and when he goes to get him back, Salad is able to go into the reflection world at night because Glass Brother wouldn't have been there to block his way.
The ending of episode 5. The shock of hearing another normal voice after God knows how long drives poor Salad Fingers into a horrific Heroic BSoD, huddled in a corner of his room while hallucinating Mable's image, with empty, bloody eye-sockets, making more "mouth-words" at him. We never see her again after this. Now...why were her eyes gouged out like that? Was there a different kind of reactionthat we didn't see?
The plot of episode 11 seems to be a direct parallel to schizophrenia, where sufferers will have frequent auditory hallucinations, which are also frequently abusive to the person, forcing them to walk around all day while hearing torrents of abuse being hurled at them. In the episode, Salad Fingers believes his reflection is an abusive copy on the other side, and also sees his mother in the reflections, both of whom constantly torment him. In the end, he smashes his mirror, reducing his "glass mother" to a tiny shard he can barely hear, but even though he's tucked it away in a box where she won't be audible, it's still there.
The third episode, Nettles, has SF lactating, despite being presumably male. While it probably may have happened due to the series going for surrealism rather than accuracy, where nothing is supposed to make sense, male lactation is very real; it's called Galactorrhea. But what causes it is rather interesting if you review SF's situation; tumor in the pituitary gland, liver problems, slow metabolism etc. Considering how poorly he maintains his hygiene and his nutritional habits, not to mention his mental illness, the results of these alleged symptoms could have caused him to lactate. note Other symptoms are caused by hormones therapy and certain prescription drugs, but due to his circumstances it's unlikely he has access to any such supplies.
. But what causes it is rather interesting if you review SF's situation; tumor in the pituitary gland, liver problems, slow metabolism etc. Considering how poorly he maintains his hygiene and his nutritional habits, not to mention his mental illness, the results of these alleged symptoms could have caused him to lactate. note 