How messages can express both facts and inferences?

When you are messaging and you want to say something as if your angry or maybe trying to say soemthing sweet. its always nice to add a little emotion to it, such as; ;) Winking: Maybe trying to say something frisky; or HOT <3: A heart: to express that you love the person or the suject you and your lover are talking about. :P Tongue Stiking Out: Maybe your saying a joke and you don't want your lover to take i as an insult. Ect. These kind of emotions will let your lover know whether he/she should take it as a joke or serious.