The winking eye emoticon in social media has more humble origins in grammar as a semicolon— a punctuation mark used to separate two statements which, in fact, can standalone as two separate sentences.
; = winking eye emoticon means I am flirting with you.
I am not flirting; I am just teaching grammar. = two related statements which can be punctuated as two sentences.
I am not flirting. I am just teaching grammar. = two related sentences which can be punctuated as a one statement.
And this is just wrong and rude: I am not flirting; maybe you should just learn grammar. = Ah, no; but a comma could fix this.