Apparently, people who use a nose also tend to use fewer abbreviations, like "lol."
He also says that the rules dictate emoji are used between, or at the end of sentences, almost like punctuation.
Your emoji use says a lot about who you are
Linguistic scholar Tylor Schnoebelen, who wrote his Stanford PhD thesis on emoji use, claims that only older people use a nose in their smiley faces, like this - :-)