Me too

Ehhh... I guess that all depends on how specific they want to be with things: like using -들 to indicate whether a noun is pluralized, or if that's something that can be inferred from the context of the conversation while the noun stays in its single form?

Haven't come to a solid answer on that myself as of yet, like if the grammar even works that way. Is using -들 the only way to indicate multiples in cases like this?

Yeah, why not snake or Mr garam. Miss him in the last few quizzes.

I think so. This link discusses the two, apparently one is native Korean and one came from Chinese:

https://www.italki.com/question/188336?hl=ko

According to naver 끓다 is the other one