Sure, you use the Messages app to send along SMS and iMessages all day long. You know how to use Emoji’s, too, with a tap on the international keyboard button on your iPhone.
I bet you even use regular text emoticons, like semi-colon and parenthesis to create a wink, or colon and parenthesis to create a smile.
But have you ever tried to have your iPhone turn your text-based emoticon into an Emoji? I bet you haven’t.