how do i start a sexting conversation?
100+ Text Conversation Starters That’ll Get a Response Back 
How to Start a Text Conversation with a Girl
Just like certain face to face situations, starting a text conversation with a girl is not always easy.
Want to give me something to think about as I fall asleep? These sort of remarks would certainly realize your teen about the aftermaths of such sexting conversations.
Suggesting is an indirect way of communicating.
If not, then you can just change the subject and move on.