Anonymous9: A6
That wasn't a confirmation, he just said that "it wasn't innuendo". I think it refers to that the threat of violence was made in seriousness, not trying to come onto him as a kismesis, rather than meaning that purple would come from him ejaculating or somesuch.
Anonymous11: A6, A9: I read that as being similar to the human expression "I'll hit you so hard you'll pee blood" - it explicitly *isn't* the same color normally, Karkat will just injure him so badly there's blood in it.
That wasn't a confirmation, he just said that "it wasn't innuendo". I think it refers to that the threat of violence was made in seriousness, not trying to come onto him as a kismesis, rather than meaning that purple would come from him ejaculating or somesuch.