When the person you are texting does not want to have an actual phone conversation so you have to write a lot rather then just being able to say it.
Lucy was crying all night because Brad broke up with her. I tried to call her but she wouldn't answer so I was novel texting her for about an hour.
Bobby was novel texting Cindy the other night because she couldn't talk on the phone. He was trying to convince her to sneak out to go to a party.