haha good question ;) 한글 is pretty straight forward so Koreans don't spell things out as much but there are definitely times when we do that too. For example when we meet someone new and ask for the name and the name isn't something very common, then we do that just to clarify. Recently, I met this person named 기림 and that's a really rare name. So I had to ask 기림이요? 그림할때 림이요? (기림? 림 as in 그림 (painting) 림?) So yeah, that's one example of how we'd do.